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"Love Stinks"


Love Stinks: Intraspecies Chemical Communication

Department stores around the country are currently selling fragrances for men and women that supposedly contain pheromones, the mysterious chemicals responsible for intraspecies subliminal communication. These fragrances ideally make people more attractive to the opposite sex, but whether or not they actually work is disputed. An informal study done by ABCNEWS suggests that pheromone additives in perfumes do work, but their method was not a rigorous scientific investigation. Rather, they informally observed twin women at a bar. One twin wore the pheromone scent, while the other wore a placebo. Much to the delight of pheromone marketers, the twin wearing the pheromone was approached more often by men than her sister. While investigations such as these may convince a consumer that Pheromones added to fragrances are a worthwhile investment, nothing has been revealed about human pheromone perception. Do humans really have Pheromones? How are Pheromones detected? What exactly is a pheromone, anyway? Are Pheromones related to olfaction? Do Pheromones actually affect the way that people and other animals behave? To answer these questions, and many more, rigorous scientific study is required.

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Pheromones are chemicals employed in intraspecies communication. Pheromones may be proteins, steroids, or any other chemical released by the body. The vomernasal organ (VNO) houses the chemoreceptors involved in detecting pheromones. The sensory system that perceives Pheromones is similar in many ways to the olfactory system, particularly in that both systems transduce chemicals. Additionally, smell can be "emotionally potent" in humans, and possibly other animals, just as pheromone detection could affect animals' emotional states, at least according to popular culture.

In mammals, the VNO is an elongated tube lined with chemoreceptor cells that extends from the nasal palatine canal . The neurons of the VNO are bipolar cells covered in microvilli or cilia. Chemicals that stimulate the VNO are generally non-volatile and dissolve in the mucus of the nasal organ and diffuse into the duct . In some animals, such as the hamster, large blood vessels near the VNO duct act as pumps, sucking the nasal mucus into the duct to increase the likelihood of contact between the chemicals and the neurons of the VNO . Some volatile molecules may be detected if they reach the chemoreceptors of the VNO, but primarily dissolved substances stimulate the VNO neurons. Either small amounts of specific chemicals or high doses of other chemicals may excite the chemoreceptors. The specificity of the VNO is still ambigious.

Whether humans have a VNO or not has been debated. During fetal development, a VNO does appear. Many doubted the existence of the VNO in adult humans until the 1980's, when revived interest lead to the examination of thousands of human noses in search of the VNO. The majority of nasal passages examined actually did have a small pit that seemed to resemble the VNO of other species . Studies have yet to conclude if the human VNO is functioning or merely vestigial . If the human VNO does function, its behavioral implications are dubious.

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In other mammals, such as mice, voles, and hamsters, the VNO appears to play a vital role in several aspects of behavior, particularly mating. Removal of the VNO can be detrimental to the mating habits of rodents. Female mice and voles cannot influence each others' estrus cycles after their VNO's are removed . Additionally, male stimuli cease to quicken puberty in immature female mice and voles without VNO's . Male mice and hamsters do not mate when deprived of both VNO and olfactory input. Sexually experienced males will mate if either the VNO or the olfactory system is intact; sexually inexperienced males have difficulty mating without both systems . Even though the VNO seems to be vital in the mating habits of rodents, the changes in rodent behavior after the removal of the VNO could be caused by something else entirely. A nerve, called the nervus terminalis (NT), is damaged when the VNO is removed . The NT, which follows the vomernasal nerves and ultimately extends to the forebrain after bypassing the AOB, is very rich in LHRH, the hormone responsible for LH release . Changes in levels of LH caused by damage to the NT could explain behavioral changes in rodents after VNO removal. In fact, the suspected human VNO nerves could simply be the NT. However, the role of the NT in rodent mating seems to be marginal, since damaging only the NT has little effect on rodent behavior.

Rodents appear to be affected by the VNO, but are humans? People do communicate chemically. A woman with a very regular menstrual cycle can unconsciously normalize the cycles of other women who live in very close proximity . Vaginal secretions, particularly "volatile aliphatic acids," are also suspected of acting as Pheromones. The specific chemicals found in vaginal secretions vary cyclically, and male rhesus monkeys are sexually attracted to the odors of some human vaginal secretions, which contain many of the same chemicals as the secretions of female rhesus monkeys. The biochemical likeness between humans and other primates suggests that humans and rhesus monkeys could react similarly to the same chemical stimulus. Yet, the relationship between these chemical communicators and the human VNO are still not clear.

The human VNO seems to be a possible factor in human behavior. While the role of the VNO in human chemical communication has yet to be established, circumstantial evidence suggests that the VNO could actually influence human activity. The commercial interest of the fragrance industry in establishing the reality of a functioning VNO will speed research, but the resulting data could definitely be distorted to suit the needs of the companies funding the investigations. Also, if humans sense Pheromones, they likely produce Pheromones.

Nexus Pheromone - The worlds most powerful Female Attractant

Human Euphoria - Gain influence over women in the workplace


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