Secret Body Parts You Didn't Know You Had

the last one.
I'll never get that image out of my head.

Can someone actually explain the first one, why do I feel like smoking when I'm drunk?

Who comes up with this stupid bullshit? Not a physiology major thats forsure

The second male brain? In the ass? Groundbreaking. Shit, i think the nobel prize for medicine went to the wrong person

Omg guys... I am about to start medical school and for a minute, I almost believed the first one. Or I must be super dumb.