Obviously depends on the men and, unfortunately, there still are many who fit the stereotype of a surrogate mother once they've flown the nest.
That said, about men and sex...
I agree that they also want emotional support and that this may be achieved through sex in a way that it often is not for women
I've gone NC on this as I'm a fairly regular poster and feel a bit bashful chatting about this, however, as a man, by and large I agree there does seem to be something that's a bit more vital about sex for men than for women. That said, for me, the importance isn't so much the thrill and "urge" as it were - its more the way making love really does increase intimacy.
When I think about it, its when two people are really at their most vulnerable - naked, showing their whole body off warts and all, exposing the most sensitive parts of their body. Even more so during the act itself where women allow the man to penetrate them. That must take a hell of a lot of trust (to a lesser extent, similar for men too with oral, since you're putting one of the most sensitive organs of your body somewhere where serious damage could be done, if the one giving it were so inclined!)
Maybe its the fact that men, generally, aren't so good with the whole sharing and communicating of emotions (as a PP noted above - largely, I feel, because we're conditioned to be stoic and taught this is "desirable" not just by society, but by women specifically too - the whole "strong and silent" type). Its often noted that men have to have a "reason" to bond - whether its playing sports or going fishing or putting up a shed - where the bonding occurs almost under the pretence of it being a happy side-effect (just watch Gone Fishing). So I guess it stands to reason sex might be a similar. Hopefully things are slowly changing in this regard for men though.