| Ellen Fein and Lance Houpt Ellen Fein wrote the Rules, and lived by them. nytimes.com |
Valentine's Day Special: K*I*S*S*I*N*G As natural as kissing seems, it also means swapping mucus, bacteria and who knows what else, so how and why would such a behaviour evolve? feeds.newscientist.com |
Valentine's Day Special: Say it with flowers Want to woo someone with flowers? How about something really special, such as a blue rose, or maybe even an orchid that glows in the dark? feeds.newscientist.com |
Fellatio keeps male fruit bats keen Female short-nosed fruit bats have been observed performing fellatio on males during copulation – it prolongs the mating act feeds.newscientist.com |
Men beware: moving country could affect your libido Levels of hormones that influence sexual arousal and disease susceptibility are in part determined by where men live feeds.newscientist.com |