I guess he's a tycoon of some sort? I just assumed it was inherited or he was a Zuckerberg-type dotcom guy. And while I definitely agree 6-7 years isn't much in numbers, I just figured the dude had more "road miles" for his age than the woman here (plus, from what I remember of both ages, there actually is a significant difference in experiences and life outlook, decision-making, etc. between a 20-yer-old and a 27-year-old).

Or, you know, just bad writing. ;-)