You have a point.

In this case, " she's polite" gives you a pretty good clue..."nice girls" don't want to be "rude" and loud, they just act reluctant or freeze up,  he  doesn't get the message or ignores it, persists anyway, and you end up with sexual assault...

That's why "positive consent" is now the rule. If she isn't participating actively, she isn't consenting. A lot of men haven't gotten the news yet.