I actually prefer no release in session or immediately afterwards, so I have never sought that permission. I value the pleasure and excitement of being horny over long time higher than a release, which is ten seconds of intense pleasure followed by losing interest in the whole play situation.

So wearing a chastity device for a typical two hours session does not stop me doing something I otherwise would. The function of the device on me is really only as a symbol of Mistress' control and dominance.