We're not going to lie; we get the appeal of humping your former flame. It's comfortable but still exciting, lingering emotions make things steamy in seconds, and, hey, you still remember the spots that get them going! We totally see why you're dipping your pen in that inkwell.
But to continue on that writing analogy, you should be scribing new stories, not revisiting old ones. Quite frankly, it's a waste of your resources. You should be out there wooing new girls, putting the effort in to having sex with someone you actually like and see a future with. You know this (really, you do) but at the end of the day, you're sorta lazy. Stop procrastinating, get out there, and put in work!