10 weird things you didn't know about sex! (PHOTOS)

Today is International World Orgasm Day! That's right—it really does exist! And since it seems like a new study about sex comes out every single day, we decided to help you kick off the, err, celebration by rounding up some of the strangest and most random facts about sex that you've probably never heard of.  

Trust me-- you'll be shocked, not to mention probably more than a little bit fascinated, by some of them (I know I was!). Below, check out 10 weird things you never knew about sex and orgasms…and enjoy this unique holiday!