I too struggle with the same sin that Mark, Carlos and others mentioned. One thing that has helped me a great deal in this area is confessing this sin to an accountability partner, and mine just happens to be my wife, who has authority over my body (the passage is in 1 Corinthians somewhere), to whom I must go with sins of a sexual nature. My wife is wonderfully forgiving, and dealing with this issue in particular over the last year or so (where it was never dealt with previously) has brought us to a new place of intimacy. If you're not married, I would recommend getting with another male in whom you can confide. For me, making the committment that I was going to be accountable to my wife about this immediately gave me a HUGE disincentive to be disobedient, or positively, a HUGE incentive to be obedient, as I didn't want to have to go to her with the sin again, because I realized how much it impaired our relationship for one (but more importantly, my relationship with Christ).
