masturbation 3 - masturbation and BDSM

OK, so now we are getting comfortable about discussing masturbation with friends and strangers - what about masturbation in a BDSM context? One thinks of masturbation as pleasuring oneself, which of course it is. But when that becomes controlled by another then it can become a powerful tool in a D/s context. It can be used in contrasting ways - through denial or through demand.

A sub friend of mine once had an online Dom who would control her masturbation. On some days he would instruct her via text or email to masturbate at various times during the day. This could be into double figures.

Other Doms might refuse permission for their subs to masturbate. There is a whole range of chastity devices available for men and women. Some for men look extremely painful in the ways they are designed to prevent or punish arousal. Trying to create arousal in such a situation might a be a fun activity for a cruel Domme.

Another cruel play scenario is where a sub might be constantly instructed to arouse themselves but refused permission to orgasm. There must be multiple BDSM games that can be played using masturbation - some of these from a distance. Many Dom's like to keep their subs aroused as ongoing training.

Have you ever used or had used on you a compulsion to masturbate or a prohibition of masturbation in a BDSM context? Or perhaps you have other examples of how masturbation can be used within BDSM play? Or even fantasies...