What about the really old seniors? I'm sure you've seen them around, those really ugly farts with awful breath and brown teeth? Some of them are 82 and older! Love truly is blind, or so it would seem. I'm guessing most hotties are after fatherly figures. Someone to look after them. Someone they can confide in.
There's also the public reaction to consider. Geezers that gray aren't supposed to be looking for age gap relationships. Older men are usually highly reluctant to approach younger girls. They have a mystifying aura surrounding them that drives girls absolutely crazy. They'll do anything to win his attention.