When he jerks off to CXXX, do you think he's fucking Christian up the ass or the other way round??
i think he tried to get some and got turned down based on hygiene and lack of witty banter and the rest is bitter unrelenting hurt feelings history.
I think Donkey is torn about dating CXXX. He really craves his body, but he doesn't date anyone he can't beat up or bluff with his prison-learned psycho-babble.