Members of species with shells they must hold onto for survival have larger sexual tubes than those with less precious private property.

Despite the prevalence of pheromone products on the market, substantial evidence that they can induce sexual attraction is lacking.

The brains and bodies of young female rats can be accelerated into puberty by the presence of an older male or by stimulation of the genitals.

The brains and bodies of young female rats can be accelerated into puberty by the presence of an older male or by stimulation of the genitals.

For the first time, researchers have documented interspecies sexual behavior between a male Japanese macaque and a female sika deer.

Idiot Brain, Wild Sex, Why Diets Make Us Fat, and The Ethics of Invention

Biologist Carin Bondar delivers a TED talk about the wilder side of sex.

Social networking sites may facilitate the spread of sexually transmitted disease, but these sites also serve as effective education and prevention tools.

Not to be outdone by vertebrates, invertebrates employ a suite of interesting structures and behaviors to accomplish procreation.