well i cum fast but i am like 5 inches so i can keep hard and i just keep going with the same condom on till she cums and usally i cum like fucken twice before she cums once and if im really in the mood ill keep going till i cum like fucken 3 or 4 times lol it sometimes the cum gets on her cunt lips but doesnt go in so yea i think you should do my technique lol. but do what you want.