When approached and tempted with sensual thoughts or situations, the right thing to do is run, flee get away from it quickly.
Read: I Corinthians 10:13 and 1 Corinthians 6:18
No temptation has overtaken you except such as is common to man; but God is faithful, who will not allow you to be tempted beyond what you are able, but with the temptation will also make the way of escape, that you may be able to bear it.
Run from sexual sin! No other sin so clearly affects the body as this one does. For sexual immorality is a sin against your own body.