@nokidshere
He's right, they are adults and it's their own business who they sleep with. As long as it's mutual and no one is being forced or coerced of course.
I think my sister who is 55 and her husband who is 70 would be pretty upset if someone described their 39yr marriage as 'distasteful'.
A sixteen year old can't get married without parental consent, so you must be saying that your parents were either a) weird (like cultish fundamentalists, say), or b) completely uncaring. Have I got that right,
@nokidshere?
Wanting to get married at 16 strikes me as a kid who wants to escape their homelife and set up a fantasy replacement in which they are nurtured and taken care of, hence choosing a semi-parental figure.
I'd certainly be concerned about the motives of the 31 year-old. As they are together thirty years later, and happily so, I'd say your sister was exceptionally lucky.
Through work I've done in the past, I've seen too many young women still in their teens being abused and exploited by older men. It's heart-breaking because you know how tragically inadequate their home life has been, and they are generally treated really badly by these men. To make it worse, the girls themselves often believe that they have the upper hand because of the 'power' of their sexuality.
I can't say that I always understand the motivations of the men concerned, but it seldom involves wanting to pursue a relationship of equals.
TL;DR - @HallionRapscallion, yes it is definitely creepy. Yet on threads like this you will always see posters with anecdotes of massive age-gap relationships they swear blind are solid, caring and mutually fulfilling.