The issue is, it's MY BODY, MY CHOICE, MY ENJOYMENT, MY SATISFACTION that matter.
Perhaps you think you and your little dong is replaceable by any other bozo and his little dong (says more about you than you probably want to divulge, really), but we women usually want more than just physical connection during sex. We want attraction, love, unity and pleasure.
Sex is a YUGE deal! It's a pleasurable thing, an intimate thing, a bonding thing, a relaxing thing, a comforting thing. It's so much, and it's an integral part of most people's lives (except for asexuals, but they are probably forced to relate to sex whether they want to or not, so it's part of their lives too). (What it isn't, and what "incels" fails to get, is the DEFINING thing about you.)
It's in our emotions and feelings to f**k too, nitwit.
Yes, I think the wildebeest gets VERY pissed if someone she hasn't chosen tries to take a "cum-dump" (says more about your own cum, that you all-but compare it to feces, than you also might want others to know) in her. Ever felt the kick of powerful hind-legs and sharp hoofs in your stomach, Kappy-donnie? It could probably disembowel you...