I love making out. Everyone loves making out. Unless it's with your sister—that's gross! And illegal! But there's a lot more going on behind the scenes of a smooch than just spit-swapping: brain chemicals flow! Bacteria goes nuts!

GOOD put together this lovely montage of cinema face-sucking, along with some wonderful little tidbits about tonsil hockey. Did you know that when you start slobbering in someone's mouth, your blood vessels expand, and oxygen rushes to the brain? Your brain also soaks itself with seratonin, dopamine, and adrenaline, explaining the OH GOD YES sensation of hooking up. Now when you're in the moment, you couldn't care less about any of this stuff—but here you are, at your computer, not kissing anyone. Might as well learn something! And if you are making out right and simultaneously reading this? Well, hats off to you, sir or madame. [GOOD]