try to give him Endurnz, it will help him to stay hard longer and reduce the down time between orgasms. check out their website and the FAQ section.
Good luck

I dated my husband in high school, and he had mild cases of ED even then, but otherwise he was still a typical, horny teenage boy. We've now been together for 16 years and it's progessively gotten worse to the point that he hasn't had a Cialis-fueled erection for nearly a year, and now it seems even the Cialis is starting to wear off. He's almost never ejaculated. I finally convinced him to see a doctor, who diagnosed it as a pyschological problem, but my husband does not believe in psychology. My husband can't even masterbate because he feels it's "cheating."

We are still young and I am reaching my sexual peak. I can't take much more of this, since I am thinking of sex constantly.

Sadly, the bottom line is that you can't help someone who will not help himself. Perhaps the threat of divorce will finally push my husband to get the help WE need. I hope you don't have to be as severe to convince your husband get help, and I hope you are somehow able to quickly nip this thing in the bud.

Believe me, being trapped in a sexless marriage to an otherwise virtuous and caring man can drive you even more crazy as the problem progresses over the years.

Going to a doctor is the best. I had the problem and went to a Urologist and parallely I told about having blood pressure. He asked me to goto a Cardiolist and he identified it as cholestrol. I took 2 months of medicine for it and I cannot believe my other problem went away automatically. Seeing the doctor is a must on issues. Only medical tests can prove where is the problem.

It certainly sounds like your husband has ED. It's quite common, and strikes at any age. Medication can more than likely help, but he really needs to see a doctor. Seriously, it's more common than most people think, so he shouldn't be embarrassed about it.