The question has been asked for centuries. Does penis size matter? Well, put the rules down guys. We have an answer. Contrary to the reassuring catchphrase “size doesn’t matter,” penis size really does matter to women when choosing a male partner.

According to recent studies,  women who have vaginal orgasms say they climax more easily if their man has a longer penis. What’s more, women rate men with larger penises more attractive, the researchers found.  However, men typically worry more about size than women, according to a 2007 review article in the British Journal of Urology International

The video above from our friend at  TED brings a definite answer from the animal kingdom.