Bedroom troubles

Any other older couples out there?  I'm 37 and hubby is 44 and we are trying to conceive but he has very little sex drive and when we do have sex (and he's been trying like a champ the last month) he doesn't orgasm. Dr tested his testosterone and said it was ok. I personally still think it's low and we are trying to supplement. Any suggestions for men with low sex drives or can't finish?