The first question I have is does he really enjoy intercourse?
The second question is can he orgasm rather easily by other means?
There are three issues for men; ED, premature ejaculation and diifficulty orgasming. I would take door #3 every time.
Watching sex in the movies; kissing, simultaneous orgasms is mainly a myth.
Many women can't orgasm from straight intercourse and some men can have the same problem.Couples sex is about pleasing your partner. My first long term partner said she couldn't orgasm though intercourse (which later in our relationship proved to be incorrect). When we made love I followed her instructions as to what pleased her so that she had a nice orgasm and then she would please me.
We've fallen asleep having intercourse and I wakened later still inside her. That's a real turn on. Orgasms for most men are no big deal, since we can have one fairly easily masturbating.
Your husband is stressed and stressed about orgasming and that makes things difficult. My problem when I first started making love was orgasming to quickly. I found that the longer I could last without orgasming, the less sensitive my penis would get so that I could last as long as I wanted.
My wife, my second partner can have hundreds or orgasms over an hour of love making (very gentle movement with a lot of lubricant). I can feel them and would rather have that experience than me orgasming after 10 minutes or so. In fact If I don't orgasm at all, I've had a great time.
Each partner is responsible for their own orgasm and the best they can do is have their partner try to please them.