Not sure where this is, but there seems to be a "monument" of sorts where people add their used gum to a building. Some dude had the balls to run his tongue down the entire length of one of the walls, probably a good 30 feet long. Not sure if you can get diseases or sick from doing something like this but there must have been a couple of freshies along the way that were still a bit wet.
Whelp, after a quick Google, turns out these things can be transmitted via saliva:
- Rhinovirus
- Flu virus
- Epstein-Barr virus
- Type 1 herpes
- Strep bacteria
- Hepatitis B and hepatitas C