I've always been a proponent of the "older guy / younger gal" (he's a GUY, what'd you THINK he'd say...) but not for the reasons you might think.
As someone mentioned earlier in this thread, younger girls with younger guys of their own age or very close don't always have the nicest introduction to sex; probably 98% of these young guys just wanna mount, pump, come, and roll off and smoke a cigarette. The gal probably is hurt, both physically and emotionally, and as if that weren't bad enough, left high and... er, ... wet.
Younger guys are: A, all about themselves; B, in a hurry - - get in, get off , get out. Very rarely do HER needs fit into this equation. Unless she's severely in lust and able to get herself off on whatever he's dishing out, she's probably in for a disappointing first time, and subsequent times for an indeterminate period. Generally they're not so sure of themselves to put on the brakes and issue directions to ensure that they get theirs, too, and even if they were, how many young guys want to take such directions?
Whereas an older gent, such as, say, ME, has long since worked all that hurry up me me me nonsense out of my system long ago. A gorgeous young thing is the closest thing to heaven on this earth, and is not to be gulped down in a quick bite; it's to be savored, bit by bit, inch by inch, driving her crazy every second of the way; finding out what makes her squirm and playing all around with that to see just how far it can take her before moving on, maybe to revisit this a little later, or as a workup to round two. From my perspective, it's all about her, start to finish. I'll certainly get more than I can deal with along the way; no way in hell I or any man can match what most women can take (and want, but rarely get.)
Isn't something like that a much nicer break-in than the quick grope, slam, and it's done that she's most likely to receive from her male peers? It'll start her off on the right foot, so to speak, and she'll have a baseline to work from, knowing just how good it can get, and may be able to teach these youngsters something to boot.
If I'm full of it, I'll take my lumps like a man. Fire away!
And if they're older, but still much younger than me, I kinda have to cast my lot with the others who have said, in effect, "flattered, ego stroked, nice source of fantasy material (or stories!!), but kinda waiting for the other shoe to drop... what's the catch? Where's the hook?