My uncle recently spent 6-8 months in prison. He got in a few fights, but no inmates every tried getting funky with him. In fact, he said most of that behavior was actually the guards begging the inmates to let them suck their ***** in return for favors.
Maybe he lied. I don't know. I'm sure it also depends where you're at.
And that's why you don't want to do anything that gets you locked up. So although sometimes even if you have the urge to rape a girl you see, just think of the booty - your booty which will get raped in prison.