I can never understand cucking. You worked you ass off to get the person you want just to give them over to someone that didn't work for it. That's why I would choose cheating over cucking. They have to at least work for it.
I kinda agree, but I understand the other side too.
As example -> a couple is married for twenty years, the marriage and sex life got stale and boring.
Then sharing could be the spark to ignite a couples sex life again.
I guess in some cases it's a saving attempt then giving up a person you worked for to get married in the first place.
Edit: I used to know a couple where the wife had lower abdomen cancer and was no longer able to have sex.
The couple decided that the husband got permission to meet other women for extra-marital sex.
They saved their marriage this way. (there are many cases where men are impotent and share their wifes)
It seems that nowadays it's more of a lifestyle than trying to save the marriage.