Sex File: I can't keep up with my new, younger man

Suzi Godson: You can only have sex all night and hold down a job for so long without collapsing. Six months is about tops for that level of intensity

A dwindling sex life was the reason my marriage died, so I was delighted to meet a younger man last year who seemed as keen on sex as I was. Six months on, I can't keep up what I thought was 'new relationship energy' long-term. What do I do?

I doubt your dwindling sex life was the only reason your marriage failed. If it was, then the clock is probably ticking for your new relationship too. Although sex is important, it is not the most stable thing on which to base a romantic commitment. Studies have found a direct correlation between sexual and relationship satisfaction. But correlation is not causation: who can tell whether people who have more sex have happier relationships, or people who have happier relationships have more sex?