Males, on average, think about sex every 7 seconds. See more

Humans, bonobo monkeys, and dolphins are the only species that have sex for pleasure. See more

An ostrich's eye is bigger than its brain. See more

The blue whale has a heart the size of a small car and its blood vessal is so broad, that a person could swim through it. See more

Turkeys can reproduce without having sex. It's called parthenogenesis. See more

Snakes have two sex organs. See more

Our eyes are always the same size from birth, but our nose and ears never stop growing. See more