You're talking about Spain? Peru? Mexico? Honduras? Chile? Nicaragua? Poland? Germany? Denmark? Italy? Namibia? Canada? France? Great Britain? Ireland? Australia?People are people. Different cultures have different habits.
It's well known that Dominican culture functions as Big and Auryn have stated.
There are physical signs and symptoms/indicators of this behavior. The very existence of the cabaña is one. Prostitution is legal on this island. It's well known that many guys, whatever their social class have a partner, a mistress and also other "romantic relationships" with random women.
It's the culture. Not exactly sure why you're trying to pretend like this doesn't exist and isn't well known about.
Or are you basing this on the perspective that comes out of the USA?
Just in general, there is the stereotype and then there is reality. Applies to everything.