This reminds me of talk about situational alphas, and how women are attracted to them. A lot of the time that's what enamors young women with older men. Authoritative or expertise status/ power in a certain domain.
Reminds me of this age gap couple: the woman is like 21 or so, and the guy is 55ish. Older than her parents in fact. Keeping in mind, what I said, she took a liking to him after she had a car crash and he was taking a police report--he was the guy that responded. Needless to say this guy had game and kept in contact with her.
If your 55 years old, and you get an opportunity to bang a qt 21 year old who reminds me of Anna Kendrick and who is obsessed with Harry Potter, would you do it? I sure would.
They're married and trying for kids, although the dude has a vasectomy.
The mustache and the police uniform helps too obviously.