It's quite possible, although it would probably depend on your definition of the word. There have been a few documented cases of female on male rape, but the circumstances were decidedly odd. Generally the man has to be incapacitated in some way (ie: drugged, tied up) as most men are quite capable of defending themselves.
As for orgasming....well, I have read a few case studies where women have orgasmed while being raped. This doesn't imply that they're enjoying the experience.... but it does suggest that men are capable of the same thing. I'm not sure why this happens, but I suspect it's more of a psychological reaction than a physical one.
Also, a lot of recent data is showing that rape isn't really about anger, rather it's mostly about sex. A man doesn't have to "hate" women in order to rape one....he just has to be a total asshole with a single-minded determination to get off.
T.