Flee from sexual immorality, every other sin a person commits is outside the body, but the sexual immoral person sins against his own body - 1cor6:18. How then can this sin be avoided? The battle begins in the mind, you need to be careful what you fill your minds with, do not habour immoral thoughts in your heart, fill your minds with the word of God at all times. Pray daily, depend on God and the power of the holy spirit to strengthen you in this battle. Don't put yourself in situations where you will be easily tempted. Remember God is watching you and you are never out of his sight. Remember Jesus is coming back soon, and we all will have to give account of every of our action. If you have always been involved in it, repent and turn back to God, you can still be forgiven if you make up your mind never to do it again. May the lord continue to grant us the grace to live above lust of the flesh in jesus name - Amen.