Male lemurs put a plug in their mates after sex so other males can't mate with the her.
Female ducks' vagina contains multiple "dead ends" to help protect them against duck rape.
Camels have three eyelids to protect themselves from the blowing desert sand.
Gay swan couples are known to lure females into a threesome just so they can steal an egg from her.
Dolphins are the only animal other than primates recorded to have sex purely for pleasure, dolphins take it a step further by engaging in bisexual and homosexual orgies.
The sex organ on a male spider is located at the end of one of its legs.
When feeling amorous, the male sea otter grabs the female's nose with his teeth.
Bats have been witnessed engaging in oral sex - Researchers say they may use this to help their partners last longer.
Mosquitoes while mating in the air perform a sex act that lasts only 2 seconds.
Female kangaroos have three vaginas.