What is it about sex that makes it so pleasurable? For many people the answer to this question would seem to be pretty obvious: orgasm. But is that really the case?

In the TEDx video below, sexual psychophysiologist Dr. Nicole Prause suggests that our intuitions here may be incorrect and, further, she challenges us to think differently about what it is that humans find so rewarding about sex. Prause delivers a thought-provoking talk that's definitely worth a watch for anyone who's interested in the science of sex.