Okay, a bit light-hearted. I know my ex says some fantastic things, wondered what others have said. Some of xps gems are:
If you dress ds in pink you will turn him gay. (Don't ask about the pink, you really don't want to know)
If you let ds go without pants his bits will get cold. (Duh. If ds wants to go commando on a weekend then that is up to him IMO)
Implied at the same time - If DS goes commando he will be a target for paedophiles (no comment)
If I had money you know I would give it to you. (Ok, I think most non-paying nrp use this, but - you can afford to drink, smoke, go out at least once most weeks, buy yourself reasonable expensive electrical products etc etc, of course you have no money)
Just a few. Sure I will think of more. What gems have other ex's come up with?