Judging by my own friends, middle aged guys who married early without having had a couple of girlfriends and sexual partners before that are the easiest males there are for seductive pretty women to swindle.

IMHO, it's a mix of desperation, inexperience, sexual (and maybe more broadly, psychological) immaturity and the delusion that they know best in this domain because of their success in other areas of life.

Considering that Huang didn't start a billionaire and is a 63 year old who has been married for 40 years, I bet he fits this profile and was an easy mark.