-Never says "God Bless You" when you sneeze.
-Unmoved by WWJD.
-Drives SUV with a fish bumper sticker.
-Doesn't recycle.
-Is self-conscious about his cloven hooves.
Should you break up with him?
So you did the Prince of Darkness. Does it make you a bad person? Not necessarily, but your morals are weak at best. Which is exactly what he's looking for in a woman.
But ultimately, it's not your body he wants, no matter how hot you are. He's actually after nothing less than your soul, and not to cherish and nurture, either-rather, to torture relentlessly in the everlasting fires of hell. So unless you're into that sort of thing, break up now.
If you do decide to stay and give him what he wants, consider yourself warned. As soon as he's finished with you, he'll move on to his next conquest without a backward glance. He'll leave you roasting on a spit for all eternity, kicking your self for your own selfish, destructive choices. Right next to those girls from your junior-high gym class, the Hummer marketing people, and Karl Rove.