At what age should a man start maintaining his skin as us women do and do your husbands do it?

I think maintenance should start way back in your twenties for both men and women but I would argue using products are only part of the process and good diet, plenty of sleep and water are just as if not more important. I'm not sure if you have already but why not treat him to some moisturiser - not the eye creams though - just leave it in the bathroom and see if he uses them. I wouldn't pressurise him to though.