Do you have any legitimate arguments against the existence of female on male rape?

I saw this question and while I did not read the whole thread, I saw a few comments stating that unless it was a case of child molestation adult female and child male there is no such thing as female on male rape. The problem I have with this idea is that I was always taught that rape is violent, unwanted sexual contact.

So, I’m just curious if the collective has any legitimate arguments against a female being able to rape a male.

Hint: Simply saying that men would love for a woman to do that is not a legitimate argument.