quote SexyTWO :
I think its a good idea to offer them condoms with anesthetic lubrication. Like Sico Marathon for example. It would be more useful.
This idea might be useful as a temporary measure.
I think that real success will require a number of visits to an experienced, compassionate provider.
I'd recommend that the man lie down with his eyes closed and concentrate on deep breathing and total relaxation while his partner gives him a light sensual massage. If she's very careful, she can keep him on the edge for quite a while before he cums.
One successful session like this can help to starting down a path to solving the problem for good.
Then, on future occasions, she can increase the degree and type of stimulation bit by bit.
At the very least, someone's going to have a very good time...