Eh, I’ve never orgasmed easily and never will. It doesn’t matter hugely to me. And if I overheat during sex, which I am prone to doing as I do not really sweat, there’s no way in hell it’s happening.
Contrary to what you read, not every guy is the same. Not all are motivated by the same things in the bedroom or anywhere else. I know that both male conformity-policing and feminists have portrayed all men as slavering, orgasm-seeking beasts, but it just ain’t so.
The husband might need a little help, but maybe that’s just how he is. (Still, having an honest and empathetic conversation about it is the right thing to do.)