Well it depends on what’s the cause.
If it was because he masturbated and came without permission he’d be in serious trouble. Probably Deep Heat his cock and balls or a ruin with post orgasm torture. I might let him choose which.
If he cums while I’m edging him then we still regard it as his fault as he should have told me to stop. So I’ll almost always ruin him.
My favourite though is the standing rule we have that if he wants to take me he can (assuming he’s uncaged) but if he comes from it he’s locked up without release for a week.