I think probably what I mean is touching and stroking each other in totally non-sexual ways - ie. foot, back, leg, neck and shoulder massages and deliberately avoiding touching or even going near parts of your bodies - genitals, breasts, etc. - which have any association with sex.
Leisurely massages can be wonderfully relaxing and bonding but more significantly for you and your partner I think would take away feelings of pressure, expectation and anxiety that sex has become associated with. As I say the whole point is NOT to have sex for the next few times you get together.
Maybe after a couple of weeks start to include more intimate areas but still hold back from actually having sex.
Don't worry, the desire won't go away. It may even actually increase. Just don't follow it up for now. By deliberately aiming for your "intimate time" together for the next two or three weeks to be non-sexual - but still really relaxing, bonding and enjoyable - it might help your partner by taking away something of the "issue" that non-ejaculation has become.
But I do want to say that I'm not a professional sex-therapist. I've just read a bit over the years and have had a good, sexually fulfilling marriage for a lot of years during which I've had to do a lot of learning myself.
As I mentioned previously if the issue remains ongoing there may be some underlying psychological or physical things going on and in which case suggest he has a chat with his GP?