A few small human studies suggest that using a pheromone infused perfume or cologne can increase the socio-sexual attraction of men to women and vice versus.

A 2002 study reported in Physiol Behav found that fertile, sexually active, heterosexual women who used pheromones increased the frequency of sexual intercourse, sleep next to a partner, formal dates and petting/affection/kissing more often, compared with those who did not use the pheromone perfume over three menstrual cycles.

Specifically, the study led by N. L. McCoy and L Pitino also found three or more types of socio-sexual behaviors were more likely to increase in women who used pheromones (74%) than those who did not use (23%).

However, woman using pheromones did not increase the frequency of male approaches, informal dates or masturbation meaning that pheromones do not boost women’s sexual drive.

The subjects in the trial were regularly menstruating, university women at an average age of 28 years.  In the study, a pheromone was used during the second and third menstrual cycles and seven socio-sexual behaviors during the second and third periods were compared with those observed during the first menstrual cycle (baseline) during which no pheromone was used.

The study suggests a pheromone-infused cologne or perfume may be used to increase the intimacy or sexual attraction of women to men.  That is, men are more attracted to women who use pheromones.

Pheromones can not only increase sexual attraction of women who are fertile or at a child-bearing age, but also postmenopausal women.

In a 2004 issue of Journal of Sex Research, J. Friebely and S. Rako reported similar results in postmenopausal women who used a pheromone.

In this study, participating women were at a mean age of 57 years.  Six weeks of exposure to pheromone significantly increased the frequency of petting, kissing and affection in 41% of the pheromone users, compared to 14% in the controls who used placebo.

More women who were exposed to pheromones (68%) increased at least one of the four intimate socio-sexual behaviors.

Pheromones can also make men more sexually attractive to women.

In a study reported in 1998 in Arch Sex Behav. W. B. Cutler, E. Friedmann and N. L. McCoy tested synthesized human male pheromones and found they increased the sociosexual attraction of men to women.

The study involved the participants aged 26 to 42 years.  The researchers compared men using pheromones to those using placebo to see how the chemicals influence six socio-sexual behaviors including "petting/affection/kissing, formal dates, informal dates, sleeping next to a romantic partner, sexual intercourse, and self-stimulation to ejaculation (masturbation)".  The study lasted 8 weeks.

The study found using pheromones increased 2 or 3 or more out of six socio-sexual behaviors.

None of the three human studies found any evidence suggesting that pheromones increase sexual drive or libido while they promote the intimacy or socio-sexual attraction between men and women. (David Liu)

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