The pheromone phenomenon

 Garrett Kelly, Tonganoxie senior, and Chris McGillivray, Overland Park senior, are sitting outside the Ambler Student Recreation Fitness Center on a late Saturday afternoon. Cooling down from their workouts, they start to discuss the weird sexual tension that lingers in the air while everyone is sweating through their shirts.

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Smells like love: Some scientists theorize that people can pick up on pheromones — secreted chemicals that elicit reactions in the body — through the vomeronasal organ, which is located in the septum. Animals often use pheromones to sniff out a potential mate, and some say that humans react in a similar way.

 They think that the rec center can sometimes feel like going to a junior high dance because all the men and women tend to separate. The guys are almost always on the weights directly behind the girls using the treadmills and stair masters. “I feel just like a pervert because obviously I’m forced to look at booties,” Kelly says. “I mean, the stair master, it’s like a butt machine.”

 Both guys say that there are a multitude of factors that play into the sexual tension at the rec center. They say that everyone is wearing less clothing and lots of bodies are moving as opposed to sitting still like they would in a class.

 This is all true, but something else at the rec center may make us feel a little frisky as we sweat as well. They’re called pheromones.

DENNIS DAILEY’S ATTRACTION TEMPLATES:

Sniffing around for a significant other isn’t going to cut it. According to Dennis Dailey, everyone has an instant attraction to someone who may be physically attractive. We all have different opinions of what we find attractive. One person could find blondes more attractive than brunettes, but another person could think the opposite. In other words, we all have our own “attraction templates.” These templates resemble targets because the type of person we find most attractive is at the very center. Then, the outer rings that grow farther from the center represent decreasing attraction levels. So whoever isn’t in the very center of your attraction template will never be as attractive as the person who is in the center, no matter how nice he or she smells.

SMELLING ATTRACTION

 Pheromones in humans are a mystery because scientists have yet to identify a chemical as a human pheromone. But scientists are certain that pheromones in animals exist. When you see dogs “making their mark” or sniffing another dog’s bum, they are communicating with pheromones. Animals and insects have the ability to produce substances that can signal many things, such as danger, a trail of food or a potential mate. After the pheromones are secreted, they are carried through air currents and received by another member of the same species. In other words, pheromones are very much like an airborne communication system.

 While humans are not blatantly sniffing each other’s bums, many studies and surveys show we may be subconsciously smelling pheromones to sniff out potential partners. But unfortunately hard evidence has yet to be discovered.

 Although scientists haven’t pinned down the facts about pheromones, they speculate the presence of pheromones could be picked up with the vomeronasal organ (VMO) when another person sweats or secretes pheromones. This organ is located in our septums and is a part of our olfactory systems, which enables us to smell. Some say that we no longer use this organ and we must have inherited it from an ancestor, but some believe we actually do use the VMO.

 Two kinds of pheromones that the VMO may be able to pick up are releaser and primer pheromones. Releaser pheromones can trigger an immediate behavioral response from another person, such as when a person becomes instantly attracted to another person for no apparent reason. Primer pheromones cause a physiological response, such as women synchronizing menstrual cycles.

ANECDOTAL EVIDENCE

 The most popular primer pheromone evidence involves the synchronization of menstrual cycles. Martha McClintock, professor and director of the Institute for Mind and Biology at the University of Chicago, was one of the first to question the mystery of synchronized menstruation. In college, she noticed that she and other women in her dormitory were having their periods at the same time, and in 1971 she published her theory of primer pheromones causing the synchronization.  

 In 1998, McClintock wanted more proof of her findings. Because pheromones are thought to be released from the hairier parts of our bodies, such as the armpits and genitalia, she swabbed odors from the underarms of women who lived with each other. After swabbing, she put the odors under their noses, and two days later, the women were starting to synchronize cycles.

 Women are not the only ones who might be able to pick up on pheromones. Men also can catch whiffs of information from women, and a prime place for this is at a strip bar. A lot of releaser pheromones may be produced from the erotic dancers and men may be able to smell them. According to a study published in the journal Evolution and Human Behavior, erotic dancers naturally work their magic on men when they are ovulating, or in other words, when they are more fertile and when their bodies are ready to reproduce. In this study, researchers found that dancers averaged a total of $70 per hour when they were ovulating and $35 when they were on their periods. This all may be because of mood changes and being comfortable, but the same thing seems to be happening at a local strip bar.

 Tori, a local erotic dancer who asked to use her stage name because of privacy issues, says most of her coworkers make more tips when they’re within a week of starting their periods. “I’m not a huge believer in pheromones,” Tori says. “I think a lot of it has to do with attitude and mood, but I do remember making more money when I got off birth control.”

 Birth control chemically tricks the body into thinking it’s pregnant. Therefore, according to the theory from the study, it would make sense that Tori wouldn’t make as much money as she would producing releaser pheromones for the man shelling out the bills.

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Scam spray? Makers of some colognes and perfumes claim that their products contain pheromones that will make wearers more sexually attractive. But Brian Ackley, professor of molecular biosciences, says there’s no universal scent that everyone is attracted to. “Even if you had every known odor, you still wouldn’t be able to figure it out. It’s all part of the beauty of being individuals,” Ackley says.

INFUSED SALES PITCHES

 While men and women smell each other in strip bars and dormitories, some companies are trying to convince the public that we can actually take the effects of pheromones into our own hands by putting on a pheromone-infused perfume or cologne. Pheromones are said to be made up of compounds of different chemicals. Some scientists say chemicals can then be separated and put into products to sell. “Scientists can figure out the chemical that makes something odorous and then put that chemical into the products. Predominantly it’s done by chemists who synthesize compounds or separate chemicals based on different properties,” says Brian Ackley, professor of molecular biosciences.

 Google the word “pheromone” and you’ll find about a half of a million sites pitching sales. The advertising might be witty, but you can never be certain which compound of chemicals are going to attract the majority of people. Every person has his or her own scent and chemical compounds. Therefore, the certainty of a pheromonal perfume and cologne effect actually working is pretty slim.

 “There’s no universal scent. Even if you had every known odor, you still wouldn’t be able to figure it out. It’s all part of the beauty of being individuals,” Ackley says. “Although I don’t have empirical evidence to prove it, I sincerely doubt that a purchased pheromone would do much good. First, it’s non-directional. If you put on a ‘pheromone’ to attract someone, you run the risk of attracting many people you’d rather not. Second, it’s much more straightforward to use other means of communication. Finally, because people have conscious control over whom they choose to have sex with, it would do no good.”

 Yet the market is still milking the phenomenon for all it’s worth. Pherlure, a top-selling pheromone cologne, may rely on advertising skills to get your money. At pherlure.com, visitors are greeted with a video of a model who doesn’t look like she’s wearing a shirt. From her bare shoulders to her perfectly placed hair, the video screams sex. With her overly sultry voice, she says, “Remember, women don’t base their choice of men on looks. We choose which guys we date based on a real gut-level attraction. It’s called chemistry. You either have it or you don’t. Pherlure will help you gain that chemistry and increase your confidence around women.”

 On the site below the video it continues to talk about that “gut-level” attraction. By using Pherlure’s product, “you can make ANY woman feel that powerful attraction.” As amazing as that sounds, you probably won’t be able to attract any woman you want. So save your money and work on some decent pick-up lines instead.

CHEMISTRY PLAYING ITS PART

 When the model on pherlure.com speaks of chemistry, she’s being misleading because releaser-pheromone effects are uncertain. We don’t actually have a lot of control over what another person finds attractive. Although animals are able to use pheromones, we are left with other chemicals in our brains that help us determine whom we are attracted to. Among these are phenylethylamine and dopamine.

 Phenylethylamine is a natural chemical that causes sweaty palms, restlessness and nervousness when it’s released in the brain. It’s caused by those subtle glances and slight touches from someone we’re attracted to. Along with this chemical, there is also something called dopamine, which has been dubbed “the pleasure chemical.” This is what makes us feel happy and as if we’re on top of the world when we meet someone we like. This powerful chemical can seem addictive, in the sense that when you don’t produce enough of it, or when you break up with your partner, you have withdrawal-like symptoms.

 Dennis Dailey, professor emeritus of social welfare and sex educator, says he doesn’t believe in pheromones. He is more partial to the effect the chemicals in our brains have on attraction.

 Dailey says we are much more advanced than animals and that most of us are initially interested in another person based on their looks and not what they smell like. “When you walk into a room, and scan the people there, you’ll know who you’re attracted to within two seconds,” Dailey says. He doesn’t deny that people could wear perfumes that others find erotic, but pheromones are a far stretch for him. He says sight plays a bigger part in attraction than smell.

FOCUSING THE EVIDENCE

 There are many theories about how people become attracted to each other. But what it comes down to is the evidence of those theories. Primer pheromones in humans, such as the synchronization of menstrual cycles, have been backed up by a lot of evidence, but releaser pheromones, the pheromones supposedly used in colognes, have no proof of actually existing in humans. Although this ability may seem like a sixth sense, pheromones may never be completely identified.

 

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Comments

Those who claim that sight is more important to us than smell should someday explain why chemicals in food are responsible for food choice, but what we see is responsible for mate choice. It is obvious to even the most casual observer that the appeal of food and of other people is based on our conditioned responses. Once the chemicals of food have conditioned our response, we know whether or not we will enjoy eating that food, and we might prefer that food given any other choice. Same thing with people! The conditioned response to the chemical signals others are sending begins at birth. So when someone tells you that it's really what you see that punches your buttons, ask them how your preference for those particular physical features just happened to be manifest as a sexually mature adult. Then compare what they think about how your personal preferences developed to what you know about every other animal on the planet. All animals are first and foremost dependent on their sense of smell for both food choice and mate choice. If you think you're not just as animalistic with regard to your choices, that's only because you can "think." So think about reality for a change. No other animal needs to think about the choices they make in food or in a potential mate; they make their choice without thinking, just like we do. When Ackley, as a scientific authority, says that there is no universal scent, he seems to forget that men have a different natural odor than women (remember how this article started). Pheromone-enhancement can make a man smell more masculine, and make a woman smell more feminine. Duh, do you think that might make a difference in appeal (e.g., a universally different smell of a male compared to a female). Spices make food more appealing, yet there is no universally appealing spice. Using Ackley's peculiar logic, we might all be eating the same tasteless foods every day. I wish people would take a little time to learn about human pheromones before making foolish comments like those in this article. I don't have enough time to comment further on the blatant misrepresentations of the concept that are contained in this article. But there are much better sources available for anyone who want to learn more about the reality of human pheromones. Finally, there is no functional human vomeronasal organ (and it's abbreviated VNO, not VMO). The organ has nothing to do with human pheromones, though even most of the marketers have not updated their sites based on scientific facts. Why bother? They can sell some people anything--if they make it sound like it will work. ...a sucker born every minute? Hope you're not him or her.

James V. Kohl www.pheromones.com

James V. Kohl, objective person not trying to sell products on a website:

I think that we can draw an evolutionarily significant reason for the difference between attraction to fellow humans based on sight and attraction to foods based on smell.

Humans have an extremely advanced sense of sight. As a species we are ranked with birds of prey for visual acuity, range of visible wavelengths, and amount of processing power dedicated to analyzing the signals our eyes give us. This allows us to discern differences between fellow humans very easily. A scent cannot tell us if a person is in shape, clean, potentially good at bearing children, or any number of other factors nearly as easily as sizing the person up with the eyes. Two humans emitting the same chemical will smell the same. The development of advanced eyesight contributes to the tilt away from olfactory determination of a suitable mate. Most animals do not have this same advantage.

Despite our advanced eyesight, we still rely on scent for food. Why? Because we can't see the bacteria and other pathogens that contaminate bad food which can make us sick and even kill us. I ate some delicious Indian food yesterday that looked only slightly different from something that might be the product of a night of too much drinking, but the smell coming from it was fantastic, so I ate it and did not get sick. However, I might see a plate of chicken that has been sitting out for a few days and, while it may still look visually appealing, it will probably smell unappetizing to the point that being near it makes me feel nauseous.

To the author: Great article!

Like other mammals, we can detect differences in what most people know as "tissue type" using our sense of smell. There is no data that supports any similar argument for such discernment via visual input. We can't see differences in tissue type! Besides, there's no sex difference in what males see compared to what females see; our visual pathways and processing of the input are the same. How does a male eagle know a female eagle when he sees her with his eagle eyes? Until recently, there was very little information on olfaction in birds, but common sense still tells us that we're like other mammals--even before we learned about the olfactory prowess of birds. Bottom line, every species from yeasts to primates like us relies on chemical signals (odors and pheromones) for food choice and mate choice. Many of these species don't have eyes. Those that do have eyes do not have a direct pathway that allows for sex differences in the effect of visual input on behavioral affect. The direct pathway is the sense of smell. Our response to visual input is conditioned by the effect of chemicals on hormones.

Did you mean to imply that having a product limits my objectivity? Just in case others thought so, I've listed some of my peer-reviewed publications.

Kohl, J. V. (2007). The Mind's Eyes: Human pheromones, neuroscience, and male sexual preferences. In M. R. Kauth (Ed.), Handbook of the Evolution of Human Sexuality (pp. 313-369). Binghamton: Haworth Press. (social science award)

Kohl, J. V., Atzmueller, M., Fink, B., & Grammer, K. (2001). Human pheromones: integrating neuroendocrinology and ethology. Neuro Endocrinol Lett., 22(5), 309-321. (neuroscience award)

Diamond, M., Binstock, T., & Kohl, J. V. (1996). From fertilization to adult sexual behavior. Horm Behav., 30(4), 333-353

Excellent article, sans the minor acronym typos. Yes, it is the VNO (a.k.a. Jacobson's Organ) and it is active as far as I can tell science is a little slow and contradicting. Pheromones that create attraction are a by product of bacteria consuming DHEA from the axillary. Some info for more info on these topics:

http://www.monell.org/

http://oak.ucc.nau.edu/propper/bio545_docs/Exam%201%20Paper%201.pdf

http://www.ncbi.nlm.nih.gov/pubmed/11303754

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T8X-3TGMWRH-W&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&_docanchor=&view=c&_searchStrId=1140194652&_rerunOrigin=google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=ce7eca49f88b238739f4086bfddc1cc3

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