Watch - Health Science Turns Sexy

Thanks to senior anatomy lecturer Dr. Claudia Diaz at RMIT University in Melbourne, Australia, we get to see hot 22-year-old footballer and chiropractic student Zac O'Brien strip down to his tiny whities. Zac had his entire body painted over for 18 hours straight to show students the muscles, tendons, and bones that would be visible if Zac were stripped of his skin.

Who knew learning anatomy could be so much fun? Check out more photos and a video of 'anatomical man' after the jump.

Watch - Vlog Brothers On Identity, Love, Sex, And Attraction

The Vlog Brothers brought Hannah Hart, Ze Frank, Tyler Oakley, and Meg Turney together to discuss sexual orientation. This is one of those rare videos that explains the differences between sex, gender identity and sexual orientation. Check it out after the jump. 

Watch - On Anal Sex

Dr John Corvino addresses those who seem to think there's nothing more to gay sex than anal sex and explains how squeamish visceral reactions can sometimes masquerade as moral judgments.

Watch - The Science of 'Morning Wood'

Yeah, you’ve woken up with it or been woken up by it. But despite what you might think, morning wood isn’t caused by dirty, sexy dreams. It’s actually just nature’s way of protecting the penis.

AsapSCIENCE looks at the “hard” facts and some of the biology of an erection in this video.

The Genderbread Person

Gender is a tough subject to tackle nowadays. Let me present to you the genderbread person. I personally think this is a great educational tool. For more on the genderbread person, click here.