There are some men that can stay hard even after they ejaculate a few times, but only if they are with a woman the *REALLY* arouses them in every way. But this is the exception and not the rule.
Unless you ejaculate prematurely, what is the big deal? I don't know of very many women that want to do the old *in out* for hours on end....
I gotta shake my head because even at 56 My Old Grump still wants to keep going after we are both *done* and I am like.... ARE YOU HIGH?!?! Hello! My coochie is waaaaaaaaaaay happy, I want to go to sleep or get back to work, whathaveyou.
You dont NEED such unless you are having a hard time getting hard. Otherwise, it is pretty much a waste. Being 100% straight up with you.