[The following information is intended as a response to the leaked Bethel video regarding masturbation. If you are not aware of that video, please check it our before attempting to comment.]
Masturbation is not sinful, unclean, or wicked. Under Jewish law, if a man experienced a wet dream, he was considered ceremonially unclean for a certain amount of time, but so was a woman who experienced her normal menstrual period. Being ceremonially unclean was not considered sinful even under Jewish law. The Watchtower has even suggested that a Jewish man might even look forward to the release of tensions provided by experiencing wet dreams.
Fundamentalist religions, such as Jehovah's Witnesses, classify such normal physiological functions as dirty or sinful, then capitalize on the resulting feelings of guilt so as to strengthen their control over their adherents. They ought to be ashamed!
Bonnie Zieman's book, Exiting the JW Cult, explains how neurotic guilt--the feeling of guilt imposed by others when one has done nothing wrong--can lead to self sabotage, punishing oneself for perceived sins which are not sins at all, and actually cause symptoms of real physical and/or psychological illnesses, depression, etc.
Do not fall for such wicked tactics of conniving, ignorant and unclean men such as those who call themselves the Governing Body.