You know what turns you on at the strip club and while watching porn? Mirror neurons. Your brain goes into anticipating and remembering how sex happens, but no sex actually happens, so you look at more porn, continuing to remember how sex happens, making your brain actually go through the motions of sex, until you've made a mess in your boxers. Oh, yeah: mirror neurons are also involved in how you learn to play piano and ride a bike, but if there's ever been proof of a God, it's the ability to trick mirror neurons into having sex and masturbating while you're doing it. It's like Disneyland and every illegal drug mixed into one, and you're made that way.