Yes, I agree with johns...this turned my 'ex' into an ego-maniac. It made him worse. I had read where it may be a good idea to keep this connection with your ex. I'm not so sure...I believe it complicates things more. I did like myself afterward. My heart was in the right place...but he doesn't have one. lol
Now, if you are doing it strictly for 'some damn good fun' as you put it...that is a personal matter for only you to decide.