Booty call to the ex, hoping (at some level) for some make up sex, but willing to settle for just getting to touch that ass one more time and doing it in front of your current girlfriend makes it that much more obvious to all concerned.
You think I'm kidding, and yeah, ok, but...when you bond with a player or a group and it breaks up because one partner just can't go on with you like that, still the love, always the love, but not gonna be the partnership ever again, no, not gonna be the partnership, it runs deep sometimes. This shit is personal.
Makes a lot of sense. One can underestimate these feelings.