Mating Facts

Rattlesnake mating sessions have been known to last more than 22 hours.

Male iguanas have two penises, called hemipenes, which they use one at a time during mating.

The male gypsy moth can "smell" the virgin female gypsy moth from 1.8 miles away!

Billy goats urinate on their own heads to smell more attractive to females.

Male kangaroos flex their biceps to impress females.

Banana slugs can grow up to 10 inches long, and their penises—which emerge from their heads—can be equally impressive. After mating, one slug sometimes gnaws off its partner's penis in a bizarre process called apophallation.

Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.

When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.