great boyfriend not so great sex

I'm dating the man of my dreams and I've never been in such a good healthy relationship before in my life! So much mutual respect and healthy communication, we are moving in together soon BUT! Our sex is not that great, some times a girl just wants to be pounded into next week and he can't do it. I've asked and he will start but then 3 pounds in need to stop so he doesn't cum. I need help! I would never leave him over this obviously but give me some tips on how you trained your man to last longer or awesome toys that can supplement 😉