Some species of whale are able to have sex with dolphins. The products are referred to as 'wholphins'.
After pandas mate, the females chase the males out of their territory and raise the cubs on their own.
A male lobster's bladder is located in it's head. And when two males fight, they squirt each other in the face with urine.
A male emperor moth can smell a female emperor moth from up to seven miles away.
A sea slug that is able to detach, re-grow and then re-use its penis has surprised scientists.
Japanese researchers observed the bizarre mating behaviour in a species called Chromodoris reticulata, which is found in the Pacific Ocean.
Male cats have over 100 tiny spikes on their penises.
Female hyenas have a pseudopenis. This is basically a very enlarged clitoris.
The mouth of a jellyfish is also the anus.
Intercourse between rattlesnakes can last up to 20 hours.
Female duck's vagina contains multiple "dead ends" to help them protect against rape.
