Last weekend was Valentine's Day and while plenty of you got a little freaky with your special someone (or watched someone else get freaky by checking out 50 Shades of Grey), I'm doubting many of you got anywhere near as freaky as the animals in this Toptenz list do when they get down.
From the fruit fly with sperm 20 times longer than their bodies to the water baotman with a penis that can make sounds as loud as 100 decibels, the animals in this article are a great reminder of how strange and amazing nature can be.