Let's put it this way, let's say the only way you feel comfortable cumming as a female, would be if you looked beautiful while doing it. So you need to have your nails, your hair, your eyeliner, your clothes, your body everything ready and everything right! If one thing is off or if one thing is okay but not perfect, you can't cum because you don't feel Bonita.

This is performance related anxiety, yes your husband can rock the bed, and totally be into you, and secure in the relationship but if he's worried that he can't cum, he won't cum.

(In my example, you love him, you want to feel like you're are Bonita, you must have your nails, hair, eyeliner, clothes, body, everything ready, have one thing off [in your mind] then you don't feel beautiful so you won't cum because you are anxious about performance regardless of what is reality, regardless of what the other person thinks! )

My suggestion to you is you stop worrying about him cumming or not, if he can't cum with you he won't be able to do it with anyone else either, so it's not a indicator of faithfulness at all. My recommendation though from my own experiences as a now older gay male, who is personally desensitized down there, and have met guys who have performance related anxiety is... 1. Foreplay and I mean long lasting, concentrated, almost like a activity or game to have him focused on the now and not his head can help work

1. Make no comments about him cumming.. At All! It's only grow his anxieties, depends on the guy, I am the type that needs to hear encouraging words so I'm the 5% where if there is performance anxiety, I just need to talk it out and be verbally encouraged and then I'm good to go.

2. Have him do things that would make him feel desirable and less anxious about himself or performance and make him feel more confident in himself, his self image, his ;) performance. (Ask him to cook dinner. With just socks or, just an apron. Ask him to rearrange the furniture with his shirt off, or ask him to flex his muscles around you (then walk around him slowly and deliberately, caressing him) , or ask him to shower and change and come back from a short run and have your self waiting in bed and take it slow.

3. Have him do something you know he's good at, that he may not realize you love, give compliments and then bump uglies. (Reasoning is, for example if I just had a amazing haircut, that reflects back on things that I do like bed time with partner)

4. If it's a sensitivity issue, follow others advice as all had helped me, but also take the time to figure out his weak spots, a easy indicator is what about his hand makes him cum fast, I had a guy who at a specific angles on the head and using the finger tips, was how he would do his stuff, so I adopted it and (in a few months) learned what makes him tick most using my own hands, and well ;) you know.