| Humans aren't the only ones who perform oral sex. Cheetahs, hyenas and goats all go down. |
| When mating, the male octopus tears off his arm (the one that's also a penis), places it in the female, and then swims off to die. |
| Male dolphins have been known to keep females hostage and not feed them until the female agrees to have sex with them. |
| Bats have been witnessed engaging in oral sex. Researchers say they may use this to help their partners last longer. |
| Male llamas have a separate set of fighting teeth. They are used to attack and bite the testicles off of other males. |
| Female Stingrays have the ability to store sperm for long periods of time to become pregnant whenever they want. |
| Female koalas often engage in lesbian orgies when kept in captivity. |
| Penguins have one mate throughout their entire life and sometimes they `propose` by giving their mate a pebble. |
| Seahorses will flirt with as many as 25 potential partners in a day. About 37% of a seahorse's sexual encounters involve the same sex. |
| The males of some species create a "mating plug" after sex which prevents other males from having sex with the same female. |