Kiss all you want in my presence, just know you'll be called on it just because I want to be annoying 
That might stem from the fact that I'm single myself
But in all honesty I don't have a problem with it. It's just fun to jerk those couples around once in a while. Happened to me on plenty occasions and it was just funny to me.
Now if the couple looks like they might be in need of protection while kissing or they're going at it all evening when you were actually hanging out with friends I kind of consider it bad form.
That might stem from the fact that I'm single myself
But in all honesty I don't have a problem with it. It's just fun to jerk those couples around once in a while. Happened to me on plenty occasions and it was just funny to me.
Now if the couple looks like they might be in need of protection while kissing or they're going at it all evening when you were actually hanging out with friends I kind of consider it bad form.