We can’t help being tempted – there is no sin in that, Jesus himself was tempted – but we must not give in to temptation, instead we must flee from it, and quickly. Tom Wright makes an important point here in regards to sexual temptation: He says, “As clearly implied by Hebrews 4v15, experiencing sexual temptation is not itself sinful. Sin begins when the idea of illicit gratification, presented to the mind in temptation, is not at once put to death, but is instead fondled and cherished.”

Source: N.T. Wright, (1996), Colossians and Philemon, Tyndale NT Commentaries, p.134