It may seem to you that their partners would be ecstatic, but the reality is somewhat different. I got a row of coin-sized abrasions down my back from having my vertebrae ground into the carpet for so long. The problem is magnified dramatically, of course, if the couple is trying to conceive. One reason it's fortunate is that rapid ejaculation is much easier to treat. Lack of ejaculatory control manifests itself in various ways.
Some men have very little control regardless of the sexual activity.
They come as quickly in masturbation as they do with partner stimulation. Still others, probably the largest group, are fine except for intercourse. There is yet another distinction. Most men without ejaculatory control have had the problem all their lives. But there are some who once had control but no longer do.