Wut? Are you seriously claiming that some dicks can’t be too big for pleasurable sex? That if a woman has an issue with dick size it's only because she's not aroused enough? You should get your money back for those biology and anatomy lessons

Why are you so sure? Different people have different parts, and size can legitimately be a problem. Not saying that’s at all what happened in the above case, but maybe don’t make blanket statements based on your own limited experience.