Lust is a sin, not masturbation. Let us not mix up the two. To masturbate does not necessarily involve lusting after another person. True lust is an obsession and dangerous. THe term lust has been overused to mean that a person looks at another and finds them willing to consider that person for copulation. Frankly, that is part of what God programed into us. If we are not interested in copulation, there would be no way to spread the word of God! Enjoy yourself, especially if it is your only means of release. You are not hurting God's feelings or hurting anyone else. People who have not practiced some sort of masturbation, also only tolerate sex. A healthy body and psyche enjoys the physical pleasures of the body God gave us.