Evolution works in wondrous ways. Every aspect of our living selves reflects nature's innovation - from five fingered hands to our complex sense organs. But we might not always remember that sex is a precise product of evolution as well. We humans are used to hearing about even the kinkiest of our own species' practices, but for the fifteen species in the slideshow below, mating is a whole different game plan. Learn about some of the most interesting and eccentric mating practices in the animal kingdom - from a "snake orgy" to penile mutilations.
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