Myself, I'm a guy who has been happily married for 31 years; we have no kids.
However, I did have a business partner for several years who liked to brag about how awful her ex was and how she was constantly screwing him over in court. To give you an idea of the level of pettiness I saw; she was suing him over back child support issues long after both their children were over 18 and I specifically remember one instance where they were taking up the court's time arguing over a difference in some old payment or other that totaled $11.42.
Incredulous, I pulled out a ten and 2 ones from my wallet and waved them at her and said, here, take it and keep the change - while you are taking up the court's time on this there are people waiting who desperately need real justice. Her response was a 20-minute tirade. I've never forgotten it.
20 minutes for 12 bucks? That's a bargain.
I think there's a whole new business here. Maybe you're lonely for your ex-wife. Maybe you just want to remind yourself why you're single. Maybe you're getting dangerously close to dropping by her place late some night to see if one spark remains.
The answer is professional henpecking. You go see a really bitter professional ex. Fifteen minutes, half an hour... maybe some high-performance guys could take a whole hour of rabid browbeating. Of course I think good hissy fits should command higher wages than $12. But you could work that out at the (cough) Fair Tirade Commission.