>>16411326You need not consent to getting fingered in the ass, and let's say the woman is overpowering you to the extent that she's able to finger your ass, so you aren't able to get her finger or other foreign object out of your ass even though you are trying to and fighting back. At the same you are fucking the woman without her consent; perhaps she is even putting things up your ass as a way of fighting you. So yes, I would say it is possible for two rapists to rape each other, even though realistically it's a rare scenario and would not sustain itself for long.