Masturbation is touching your own body for sexual pleasure. It is common across ages and genders. It teaches people what kind of pressure and timing actually work, which is information a partner cannot guess from a film.

There is no medically serious harm in ordinary masturbation. Soreness from friction is a mechanical issue. Compulsion that eats sleep and obligations is a habit issue. Guilt is mostly inherited and can be put down.

Toys, fantasy, and porn may be part of the ritual or not. People in relationships still masturbate. Treating that as betrayal is a rule some couples choose and many others find unnecessary.

Wash your hands. Mind your nails. If a partner wants to watch or join, that is a separate invitation, not a default tax on your privacy.