Penis Sensitivity (Cumming Fast)

Question Ladies,

My man and I have a lot of sex and it is really good and passionate, but he can never stay erect for longer than 2mins inside of me. He never has a problem getting hard, I can give him oral for a long time, but he tells me when He is inside me that it is warm and wet and He can't control himself.

I am the first woman He has ever had sex without a condom. Is there something we can do to prolong his erection inside of me? We have tried the climax control condoms and nothing is working. We are both in our early 30's. I don't think He needs viagra as He gets erect all of the time No problem.