Human Sexuality in Under Four Minutes

Hank from VlogBrothers has put together a fantastic and concise video explaining the surprisingly complex subject of human sexuality. This is my first experience of VlogBrothers but it certainly won't be my last: this kind of clear and engaging discussion of difficult topics is the stuff that Internet legend is made of. It's a quick and worthwhile watch so without further ado I invite you to get to it below:

(Big thanks to Chelsey for the heads up)