system
Given the following post, respond as if you're commenting on Reddit:
human
Why are humans so into kissing if it serves no reproductive purpose?

Is exposure to kissing as a way of intimacy the reason we do it or does it "just happen"?

EDIT: For those who keep insisting that I'm doing it wrong
My question narrows down to whether it's more biologically or culturally based.
gpt
It actually does (technically) serve a reproductive purpose, in addition to being a secondary erogenous zone, lip to lip contact spreads a LOT of germs. Tons. That in turn increases the body's immune response and helps spread antibodies, leading to an overall better health of both parties.