Didnt Jah execute a man for masturbation in the old testament? Scared the crap outta me as a child.
NO.
Masturbation is never mentioned in the Bible.
An emission of semen ist not a sin. According to the bible the man is unclean until the evening. Nothing more. It's typical Watchtower scaremongering.
(Leviticus 15:16-18) 16 “‘Now in case a man has an emission of semen go out from him, he must then bathe all his flesh in water and be unclean until the evening. 17 And any garment and any skin upon which the emission of semen gets to be must be washed with water and be unclean until the evening. 18 “‘As for a woman with whom a man may lie down with an emission of semen, they must bathe in water and be unclean until the evening.