In the animal kingdom, survival and reproduction shape behavior far more than gender roles. This documentary explores how animals focus on sex, mating, and biology rather than identity. Clay Higgins ...

What purpose does the penis serve? Why is it that members of one species have no penis at all, while those of another have two? Why do they vary so much in shape and size? And where do vaginas, or the ...

From The New York Times, April 22, 2015: “Denmark passed legislation Tuesday banning bestiality, toughening a law that animal rights activists feared was encouraging animal-sex tourism. The bill ...

The evolution of sex, gender, mating strategies, and social relationships are hot topics in the study of nonhuman and human behavior. 1 People from many different disciplines are weighing on these and ...