Kissing.
It’s something we take for granted as just being something humans do to show affection, but why did it start and when?
Well, a primatologist and evolutionary psychologist has a pretty icky theory.
Buzz60’s Tony Spitz has the details.
How Did the Kiss Come About? One Scientist Has a Theory and It’s Pretty Filthy
Credit: Buzz60
Duration: 01:06s
0 shares
1 views