I have seen a lot of people breaking up and then do this ritual of asking back what they have given their partner as gift. If it is a divorce, it will be even worse. What you have seen in The Break-up is what most couple had experience or sometimes, worse. The list, the division and then the fight.
Ever been in this situation?
Where you have broken up and you wanted to teach the bastard/bitch a lesson and you asked back all the memorabilia or keepsake you have ever given him?
In my case, these may be a point of contention