Does this sound familiar?
The female knot-tying weaverbird will refuse to mate with a male who has built a shoddy nest. If spurned, the male must take the nest apart and completely rebuild it in order to win the affections of the female.
Are you expecting something?
The male Darwin frog, found in Chile, swallows his mates eggs and keeps them in a sac under his chin. When the tadpoles are big enough he opens his mouth and lets them out.
The female bedbug has no sexual opening. To get around this small problem, the male uses his curved penis to drill a vagina into the female.
I'd prefer a cigarette, personally...
The female Praying Mantis eats her mate after sex. During the act the female will hook her large arms around to hold him in place and start nibbling away. The sex drive is so strong in the male that he can continue to copulate even if his partner gets a little peckish before he's finished.
Fancy a nose job?
The male tick doesn't have a penis. Instead, he uses his nose to sniff out the females vagina. Once he's made it large enough by poking his nose around, he turns round and deposits his seamen. To finish the job off, he then turns round again and pushes the seamen inside with his trusty nose.
A little oyster sauce?
The oyster is usually ambisexual. It begins life as a male, then becomes a female, then changes back to being a male, then back to being female. It may go back and forth many times.
So, you've heard the phrase, "going at it like rabbits". Well, the desert rat makes the rabbit look a little useless in the Don Juan stakes. The desert rat can have sex up to 120 times an hour.