I agree :), It would be wonderful to see these old paternalistic ideas lose their grip in society. Good point about where these ideas get started. lol, your right about young women not wanting some old man, when they can have a hot young one. I think this is just a male fantasy that older men like to use to comfort themselves that they 'are' still attractive. In many ways its just sad and undignified for the older guys, and as you say totally gross to the young women.
Of course there are exceptions to every rule, but to suggest, as some do, that young women and older men should be the norm, is just a self interested ploy, by older men.