Given how hard it is to get matches as a man, once you have 2-3 going it's in your interest to keep them going. It's obviously bad behavior but the nature of the dynamics basically mean you have to stretch every little bit of interest out as long as possible.

Ex, I'm going on a couple dates back to back, I really want to just focus on one but it took so much time to get even one interested I don't feel I can cut any off until I have sex with one of them.