This isn't a problem really... I think the more society finds it acceptable to behave entitled, the BETTER it is for men. Why?...
As a man you should be dating to find women that are right for you... this means that men should control their emotions and not allow two types of women:
(1) Women that are not REALLY attracted and interested in THE MAN, the person.
(2) Women that are batsh1t crazy.
This is screening criteria, let a chick be herself, and her agenda will reveal itself so you can get rid of her before investing too much time on her. Women that expect a man to pay for her kids is looking for someone to take care of her and take on the burden of her own bad decisions.
But if a man is dating to try and get laid... you are fvcking up. Getting laid is going to happen, it's really not that fvcking hard and sex is MUCH better with a woman that is really attracted to you instead of laying there as an obligation as part of some exchange of goods and services.