If it works, don't knock it, although I met a couple in a hotel a few years ago that made me wonder how long it could last, she was 58 and looked it, he was 42 and in good shape, they'd been together for 20 years, she was too tired to come to the bar in the evening so the guy came down alone, I admired him for his loyalty, I'd have been off a long time ago.
Having said that, I personally think everyman should have an older woman in his life at some point, between the ages of 21 and 24 I was crazy about women of 35-45, it wasn't just the sex, which was both wild and intense, they taught me about life, style, appreciating a good restaurant, conversation and feelings.
My son is 17, he's just like me at his age and is screwing his brains out with girls of around his own age, I hope he gets an older woman soon...and gives me the young tottys phone numbers