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In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. The chemical composition of exhaled breath was examined for volatile organic compound VOC indicators of sexual arousal in human beings.
Participants male, female were shown a randomized series of three emotion-inducing min film clips interspersed with 3-min neutral film clips. The films caused different arousals: sports film positive-nonsexual ; horror film negative-nonsexual ; and erotic sexual that were monitored with physiological measurements including genital response and temperature.
While some breath compounds methanol and acetone changed uniformly irrespective of the film order, several compounds did show significant arousal associated changes. For both genders CO 2 and isoprene decreased in the sex clip. Some male individuals showed particularly strong increases of indole, phenol and cresol coincident with sexual arousal that decreased rapidly afterwards. These VOCs are degradation products of tyrosine and tryptophan, precursors for dopamine, noradrenalin, and serotonin, and therefore represent potential breath markers of sexual arousal.