My Husband Has Always Cheated, I Just Can't Get All Worked Up About It

I married a man that cheated on me when we were dating. He cheated on me right after we got married, He has cheated all our married life. I don't think about it, if I find out, it's like knowing he got his car dinged in the parking lot. I never agreed to having another girl over, or joining group sex parties, or being swinger with another couple. I know that shuts down much of his desires, but I'm not into that. He has to find an outlet all by himself, I'm not helping.