When it comes to exes, there are some 'auld acquaintances' who should definitely be 'forgot'.
Exhibit A: Angel's ex
When the jerk crashes his best friend's wedding, even the fictional boyfriend Angel made up isn't enough to make him leave. If Angel wants to get rid of him without causing a scene, he's going to need a real fake boyfriend ASAP.
Exhibit B: Damon's ex
What's worse than showing up alone to a wedding when you've RSVP'd for two? Having your cousin bring your ex-boyfriend as her plus one. There's not enough cheap champagne in all of Manhattan to make sharing a table with them not suck.
Things take a turn for the much, much better when the smoking hot guy Damon's been staring at all night asks Damon to be his fake boyfriend for the night, Damon is more than happy to oblige, provided the guy does the same for him.