7. Benefits of Kissing What's truly in a kiss? I mean, beyond the good (passionate, gentle, etc.) and the bad (face-consuming, sloppy). What's the physiological effect of locking lips? Turns out, there's an entire branch of science (called philematology) that's devoted to kissing. And it's super fascinating. According to the lab-coat-clad kissing brainiacs, smooching has some major health benefits.