First off obviously guys wanna fuck. And since the invention of the pill, and widespread use of contraceptives, women have been free to be way more sexually aggressive without the risk of pregnancy. This translates to women getting boned in a club or plowing through one night stands with attractive men. Thus, since the majority of women fit this narrative it’s not unreasonable for a man who is paying for dates dinner transportation etc. to be able to enjoy the same physical intimacy that she often gives up for free without even receiving commitment. Because of this, the guy who has actually been paying and showing genuine interest in her feels that three dates should be enough for an “emotional connection” so they can have sex considering the same girl has had multiple one night stands before with no commitment.

TLDR: I guess it’s unreasonable for guys to be upset when they haven’t kissed by the 7th date because she needs more time, a greater commitment etc., when you know dam well she has had multiple one night stands right before you started dating.