orleander what makes you think its impossable for a women to rape by herself?
she can point a gun at someone and force them to have sex with her (and the whole time the bigger stronger man won't get the gun away from her while he is on top of her?)
she could spike a guy (or girls) drink with something like medaz or GHB
she could spike there drink with just achole and rape them (he would be passed out. A man can rape a woman that way, but you will have to prove to me that a man will get an erection and ejaculate while unconscious due to GHB)
she could be a westler and do it by pure strength (LMFAO!!!)
or she could seduce a 13 year old and rape them (that isn't a man)
whatever a man can do a women could do just the same
Oh and about the erection the body responds wether you want it to or not, if a gay guy gives a guy a blowjob he will get hard even if the idea discusts him. The same if a women ate out a women and she only is atracted to men. the body responces arnt all under compleate mental control, you cant stop yourself breathing for long before your body forces yourself to take a breath
its hard to prove EXCEPT if your willing to rape someone but it happens