The Bible never explicitly mentions masturbation or states whether or not masturbation is a sin. While the Bible nowhere explicitly states that masturbation is a sin, there is no question as to whether the actions that lead to masturbation are sinful. Masturbation is nearly always the result of lustful thoughts, sexual stimulation, and/or pornographic images. It is these problems that need to be dealt with. If the sins of lust, immoral thoughts, and pornography are forsaken and overcome, masturbation will become a non-issue. Many people struggle with guilty feelings concerning masturbation, when in reality, the things that led to the act are far more worthy of repentance. . Please see the link below: http://www.gotquestions.org/masturbation-sin.html
"Sin" is a religious concept that has absolutely no validity in the real world. Masturbation is a harmless release for people who have no partner -- or even for those who have. There are some who might even turn it into an art form.
But a word of warning. Never close your eyes and murmur your own name while you're doing it. That's conceit, and conceit is definitely a sin.
Masturbation is a normal part of being a human. It releases endorphins and adrenalin into your body which is beneficial to your well being and health. It is a great stress reliever....as well as a learning experience. If you do not know what pleasures you, how is your partner supposed to know?
A spiritually unhealthy habit, masturbation instills attitudes that foster self-centeredness and corrupt the mind. A masturbator may also grow to view others as mere sex objects—tools for sexual satisfaction. Sex becomes separated from love and is relegated to a reflex that gives momentary pleasure and relieves sexual tension. But that relief is only temporary. In reality, instead of deadening the body’s members “as respects fornication, uncleanness, [and improper] sexual appetite,” masturbation arouses them.—Colossians 3:5.
So strive to put the matter in perspective. Masturbation is a form of uncleanness. It can make you a ‘slave to various desires and pleasures,’ and it fosters unhealthy attitudes. (Titus 3:3) At the same time, masturbation is not a form of gross sexual immorality, such as fornication. (Jude 7) If you have a problem with masturbation, you need not conclude that you have committed the unforgivable sin. The key is to resist the urge and never to give up your fight
The Bible does not specifically mention masturbation—the deliberate self-stimulation that produces sexual arousal and orgasm. However, God’s Word says: “Deaden, therefore, your body members that are upon the earth as respects fornication, uncleanness, [and improper] sexual appetite.”—Colossians 3:5.
Masturbation fosters a distorted and self-centered view of sex.
" Away then with sinful, earthly things; deaden the evil desires lurking within you; have nothing to do with sexual sin, impurity, lust and shameful desires; don't worship the good things of life, for that is idolatry," ( Colossians 3:5) Living Bible