By Nicole Caldwell for Thrillist
The science of kissing is called Philematology, and it’s just as unsexy as it sounds.
When you swap spit with unsuspecting partners, you’re sharing more than you think. For every 10 seconds spent at first base, you transfer 80,000,000 bacteria from one mouth to another. The cleanest mouths among us harbor between 1,000 and 100,000 bacteria on the surface of each tooth. Those of you not brushing and flossing on the regular are providing sanctuary to anywhere from 100 million to 1 billion bacteria on every single one of your (not-so) pearly whites. Hosting that kind of liveliness in a space kept at a humid 95-ish degrees makes our mouths the “tropical rainforest” of the body.