I don't really pay much attention to the little things like farting/burping/wedgies/etc..
Sometimes you just have to do what you have to do as a human being.
I, myself, am a victim of constant excessive wedgies, and after a certain length of time, it just needs to be fixed. >.<
However, I will note that PDA is okay only if it's innocent kissing or holding hands.. sweet gestures like that.
Making out, groping, having sex in public.. I suppose I could understand that "risk" factor creating some kind of thrill, but no one wants to or needs to see that kind of thing.
However, after enough time, I've managed to ignore such actions.
Unfortunately, I usually end up spending my time with someone who doesn't care if he curses loud, and he can't seem to control how much he curses, who isn't afraid to express his anger when he's in public, and who can be quite utterly rude at times.
And for some reason I still go in public with him... I should stop.