I'm might be wrong on this, but I think it depends on what country you live in. I'm from the UK and from my experience, most of my friends have age gap marriages maybe around 2 decades difference more or less, also a former landlord of mine, married an ex of a friend of mine at 30's her senior, my one friend married at 35, to a girl 18-years-old. All are still together some decades later. And a woman 24 was dating a 52-year-old in the apartment below before they moved into their own house. I have never heard anyone say a negative thing about these relationships in all this time ever. For one it is no one else's business, and as long as it's legal and they are happy, who's right is it to judge them anyway?
However, I also watch a lot of American crime docs, and even Judge Judy, and I notice something I would rarely hear on a UK TV programme. Yep, other people looking down on any age gap relationship. It's like a big deal. Even on MTV's Catfish, the victim finds out the catfish is really 18 and not closer to her age as they said, 24, lol! I've seen it often on Judge Judy, a woman who has been married at least 4 times, lecturing people on the stand, well males mostly, about how 'inappropriate' it is for say a 32-year-old man to date someone in their early 20's, as they are still 'babies' at that age and 'not fully cooked'. So that's not only a 'lesson' to the individual who is suing the younger woman from a failed relationship. That's lecturing 'America'. Making him out to be, well, almost a child molester/cradle snatcher. But any relationship can fail, JJ has had many failed marriages, not surprisingly perhaps!
I've seen repeat comments on US crime docs from the narrator. And friends and family being interviewed, also expressing their disappointment for such a relationship. True, the older one could have murdered the other but, what has that got to do with it?
Really it is nobody's business.
You do you and as long as you both are happy, fuck the busy-bodies!