Although a single man infiltrating an all girl college...this one I understand!
Actually, men breaking into an all female school seems the more perplexing.
I'm a woman in a male-dominated field (I'm a software engineer) so I understand what drives women to compete in places they "don't belong".
But when men break out of their assigned roles (to become, for example, cheerleaders, flight attendants, nurses, housekeepers, or elementary school teachers) other, "manlier" men, often question their sexuality or worse.
Sure... you can "get the chicks" if you're in those fields... but it just targets you for abuse. I don't get it.