In humans, men may perform cunnilingus to increase their sexual arousal and consequent ejaculate volume, particularly in sociosexual circumstances e. Alcohol, sexual arousal, and intentions to use condoms in young men: The human penis as a semen displacement device. Human Reproduction, 11 , —
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Cunnilingus is depicted frequently in pornography, and pornography appeals to evolved mechanisms: Thus, among mammals, cunnilingus may influence sexual arousal and consequent sperm competition tactics e. Biology Letters, 1 , — Effects of female hamster vaginal discharge on the behavior of male hamsters.
Confer, J. Sankar, R. Third, because ejaculate volume varies between men WHO , we selected only scenes starring the same male actor. Iranian Journal of Reproductive Medicine, 2 , 9— In other words, it is irrelevant whether coders correctly identified ejaculate volumes in teaspoons, only that they correctly identified the relative differences in ejaculate volumes between scenes.
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Sexual attraction function of golden hamster vaginal secretion. American Journal of Primatology, 13 , — We could not determine when the actor last ejaculated before each scene. Davis, J.