What is the summary of the the legal ruling regarding masturbation? Is it forbidden, and when is it permissible due to necessity? What constitutes this necessity?

Masturbation is forbidden unless there is a necessity, such as fear of harm to the body or fear of falling into adultery. It is a bad habit that affects the perpetrator's religiosity, psyche, and health, and it does not solve the problem of lust. The fundamental principle is that a Muslim should adhere to the limits of the Sharia. Allah Almighty has commanded those who cannot afford marriage to practice abstinence, and the Prophet, peace be upon him, guided us to fast while safeguarding our hearing and sight.