Did you know that God tells us to “flee fornication” at least 27 times in the Bible?
When I was in college, I kept a motto on my desk that said: “He who would not fall down ought not to walk in slippery places. Keep yourself clean.  Keep yourself pure. Watch what you set before your eyes.”
There needs to be sexual self-discipline in the marital relationship. Generally speaking, if you’re disciplined in other areas of life—like your sleep and your diet—you’ll find it more natural to be disciplined in your sexual life as well.
Job said, “I made a covenant with mine eyes; why then should I think upon a maid” (Job 31:1). Twice, the Psalmist said, “My heart is fixed, O God, my heart is fixed: I will sing and give praise” (Psalm 57:7) and “O God, my heart is fixed; I will sing and give praise, even with my glory” (Psalm 108:1).
You know, every time I stay in a hotel or motel, I don’t have to make up my mind all over again whether or not I’m going to watch filth. I don’t make up my mind whether or not I’m going to consort with somebody else. I have already made up my mind. I don’t make a lot of little decisions. One big decision will take care of a lot of little ones.
LWF.org