You ladies need to realize how men are "wired". Men are more "physically" oriented. (Women are too, but not as much as men). Therefore many men like younger women because they're (usually) shaped nicer and their skin is more youthful. Also, in my experience, they're more lively, more fun, more playful and they make older men feel like they've "still got it".
Now, I'm not into the extremes: Hugh Heffner extreme; Anna Nicole Smith extreme. Personally, I'm most comfortable with gals aged 35-50 (I'm 56). I'm on a dating website and I get emails from gals 50-65 and (with very few exceptions) they look older than they are. This is a turn off to me; I'm sorry but that's how I am. I do my best to fight the years and am always mistaken for a MUCH younger man than I am. A gal who is overweight, has bad teeth, sun damaged skin and the like....not for me.
Last year I had a 6 month "email relationship" with a gal out in California (from the dating site) but neither one of us wanted to leave our "coast" so, after getting to know each other very well, it ended. She is my age but really took care of herself so she was thin and attractive to me. So I say: to each his own as long as it isn't creepy extreme...