This isn't the first time we've highlighted a report of a bat species that engages in oral sex. However, this time it's the females that get the extra attention. First fellatio, and now cunnilingus: ...

Reproduction can be costly and is predicted to trade-off against other characters. However, while these trade-offs are well documented for females, there has been less focus on aspects of male ...

Pseudo-copulation -- an interaction that mimics sexual copulation -- is a behavior known in mammalian communities that reduces aggression and signifies social dominance, particularly among males.

Female chimps are more concerned with having sex with many different males than finding the strongest mate, according to researchers. The new study suggests that female chimps keep quiet during sex so ...

When news breaks, you need to understand what actually matters — and what to do about it. At Vox, our mission to help you make sense of the world has never been more vital. But we can’t do it on our ...

(PhysOrg.com) -- The duration of sexual intercourse differs wildly across the animal kingdom. Now researchers seeking to understand the evolutionary significance of lengthy copulation duration have ...

(PhysOrg.com) -- Female bonobos are noisy bi-sexual love-makers that call most when mating with higher ranking partners, according to new research. The new study by researchers at the University of St ...

Eavesdropping male Barbary macaques can tell by a female's cry whether copulation with another male has been an orgasmic experience. The female macaques emit ear-piercing calls when mating that vary ...

WHEN observing cultures of Panagrolaimus rigidus to examine their life-history, copulation seemed to depend simply on chance encounters between males and females. However, as males often touched males ...