Tease, Denial and Male Chastity
Simply denying sex to a chastity slave and forbidding masturbation without permission are in itself a way of applying chastity.
Most male slaves are so aroused by their submission that they are frequently erect and eager to masturbate. Restraining slave's penis with a chastity device or piercing, or combination of both, not only takes care of that, but deepens slave's sense of submission since it's very clear to him that he no longer has any control of his own penis.
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