Sexual cues have been well established in evolutionary psychology as indicators of genetic compatibility/useful genes. How does the human brain know that a cue is an indicator of a useful trait in ...
Most animals will only engage in sexual activity that can result in reproduction. There are some exceptions; Bonobos, for instance, engage in a lot of sexual activity that does not involve coitus. ...
Human couples usually have sex in private, hidden not only from predators, but also - other humans. It is unlike behavior of most species, including our relatives: bonobos, chimpanzees and gorillas. ...