Of course they can get raped. Sex without consent is rape. Anyone having sex with a man that has not consented is rape. It doesn't matter if a man OR a woman raped them. It's still rape, that's the end of it.
It's a sad state of affairs that anyone at all is raped, and that it is more likely for a woman to be raped, but that does not then mean that a man cannot be raped by a woman. Of course they can.
/thread