I'm willing to bet the last time you thought of kissing as gross was back when you were a kid. It was also probably around the same time we girls thought you boys came with cooties. Then you grow up ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. It may not be the most romantic thing to say, but kissing ...

Kissing in humans evolved as a symbolic expression of love from grooming behaviours seen in ancestral great apes, a comprehensive new study says. The kiss has been a versatile way by which humans ...