All I can say is let him hold back until you are able to be satified. Just like mrbojangle said, it takes quite abit of self control to be able to hold it back. I think it's great that he's willing to do that. It shows he wants you to be fulfilled too. Yay for him and you both!!
On another board you say he is very large and it hurts you sometimes. You may not want him lasting a long time, unless he is indeed able to bring you to orgasm.
Some men do have better ability to control themselves, but even the best men will sometimes be super sensitive or simply unable to get there, for a whole host of different reasons.
For you, maybe he is concerned about the pain and that inhibits him. Maybe you are too tight and it is not all that comfortable for him, so that it takes him longer. Or, he may simply be the type that takes a long time, just as there are some men who have problems lasting more than a minute or two.
If you want him to not last as long, tell him. Some men think they need to last a long time, where their partner would wish he would hurry up. So, be honest with him.
Well we recently solve that little problem we were having and everything is ok now and it doesn't take him a long time to ejaculate. He lets himself orgasm right after I have gotten mine. I guess it is just because he has self control.