Blind Monk
When your sex partner is sucking you off and your dick gets the hardest possible, force it into your sex partners eyes. As he/she whelps in pain, ejaculate in their eyes making them partially blind. Once they are rolling on the floor in agony, recite bible versus to them while pouring holy water over them.
I got raped the other day and the rapist decided to suck me off. I gave him a blind monk and he didn't come back!