Let's talk about sex. And not just any old sex. The animal kingdom is a wild place – and it's got mating habits to match. We're getting it on with kinky rituals, titillating pheromones, post-coital cannibalism, golden showers, orgy marathons and penises that put King Kong to shame. Biologist-with-a-twist Dr Carin Bondar is stripping down to the bare truth of nature's X-rated side.