What a great questions.

Its happened to me 3 times in sessions when i was younger. And I've had to focus On holding back or slowing down several other sessions. All during CBT. Once was a kick to the balls, another was just a rope being tied around. Its funny im not talking about a little dribble of cum. These were volcanoes. Definitely prefer not cum in the middle of a session but no need to stop when it happens. Weve been good to just kept going and work it into the scene. Not sure most men are like this but i normally don't experience a Sub drop just because i ejaculate. I think every time the Domme feels bad but not a big deal to me if anything it just shows how much fun i was having.

Its weird i can have normal vanilla sex and go for hours without ejaculating but femdom just sets me off.