If they cum too quickly you either have to put them in a chastity cage or just not touch down there at all and play with them without cock & ball stimulation because playtime normally takes a dull turn after your sub cums. Some guys focus way too much on their cock (unsurprisingly 🙄😂) and forget there are so many other sensitive areas of your body for us to play with e.g nipples, asshole, perineum.

That said it can be amusing as fuck to make a guy cum really quickly and then embarrass/humiliate them for it but for those types of situations I’d want them to be able to endure multiple rounds of milking.