This twisted little hypnosis file makes it so that you have to have permission to masturbate.  You can get that permission from anyone else, but they can set the conditions for you being allowed to masturbate and you will have to meet them before you are able to masturbate.  You will still be fully capable of sex, but masturbation requires permission and you can only get that from someone else and they can only give it for a single masturbation session.

The file can be purchased here: Curse - Permission to Masturbate