What do other people do that you find utterly gross?

[domestoscitrusblast]

For me it's when people gargle, spit, or brush their teeth in the kitchen sink.
You don't often touch the bottom of the bathroom sink, but with the kitchen sink you touch it constantly and wash dishes in there.

Yawning without putting their hands over their mouths. So uncouth (without meaning to sound like someone who reads the People's Friend).

When men and boys don't wipe their, um, attachments after peeing!
Omg I can't imagine how horrible that must be.