The key to successful sexual reproduction can be traced to a single receptor in the brain, according to a new study by Stanford scientists.
Females have more sexual partners when they live in colder climates and are happier being monogamous when it is hotter, a study into the behavior of insects has found.
Early adolescent girls lose friends for having sex and gain friends for "making out," while their male peers lose friends for "making out" and gain friends for having sex, finds a new study that will be presented at the 110th ...
Nocturnal animals need their noses to stay alive. Mice, among others, depend on their impressive olfactory powers to sniff out food or avoid danger in the dark.
Biologists have uncovered new insights into how the male sexual behaviour of the peculiar southern bottletail squid is primed to produce the greatest number of offspring.
Humans who cheat on a loved one aren't the only ones to change their behavior to avoid discovery.
Married men and women who divide household chores in traditional ways report having more sex than couples who share so-called men's and women's work, according to a new study co-authored by sociologists at the University ...
Young baboons that spend time with their fathers get better meals and reach sexual maturity sooner, scientists say.