The top stops touching the partner to make them admit that they want it, which is just an extra layer on the "corruption" obssession Japanese people have.
1) ...at least in yuri manga we have women corrupting women? o.o
2) ...I don't think it (the corruption fantasy/obsession) is a Japanese culture thing soley.... It may come (haha!) in more varying degrees for others, including a wider array of fantasies depicted overall in such context. Yet, especially in pornography, there still seems to be an international focus on objectifing / fantasizing of the female gender (at least from what I've seen *cough* Not that I would, you know... *cough*). That's not necessarily a bad thing, if it stays in fantasy territory. Everybody's got kinks. Many women themselves even at this time and age (according to some studies even more again than only 5 years ago ... :-| ) like to play the devote / being lead / dependent / bottom part in the sex- (and relationship-) dynamic.
I guess, the whole "orgasm bad" trope is just one extreme - not exclusive to Japan, but maybe more prominent there... (I'm not gonna do the research for other countries - maybe someone else will volunteer XD)
3) Saw the title of this thread and could not not check it out XD Thanks, OP!