Ever been the third person in a group consisting of a couple?
There have been a few times when I was the third person. For the most part it was ok because my friends managed to control their PDA.
But just imagine you're in that type of group and the couple start getting into an argument and you're just like:
And then the argument begins to escalate:
Arguments between a couple is probably worse than the PDA bit because any kind of conflict right in front of you is just an unpleasant situation. It's even worse when the couple involve you in that argument; you don't want to get involved in the dynamics of that relationship.
If you're ever third wheel, stay out of the arguments and don't pick sides!