More precisely, a cuckold (or “cuck”) is a man who has invested his attention and assets into a woman who has so little respect for him that she has no interest in being faithful.
The corresponding status on the female side is a woman who grants sexual access to men who have no interest in commitment, in a futile effort to get love and attention. Sometimes referred to as a “slut”.
These things have happened throughout history, but always on the fringes and it was not celebrated, respected, nor put out as a model for behavior.
That seems to have changed. The elites today are trying to rush us into a modern day Sodom and Gomorrah.
There are consequences for a breakdown of these values that developed through history. Rome fell because of their hedonism.