@Meanlucario
It’s usually fueled by the expense of another character.
And I’m sure it’s tempting to say they usually deserve it, but rarely do they. In fact, the worst, almost ubiquitous type focuses on how much the cuckee did absolutely nothing to deserve it beyond having an attractive partner.
And that’s just the base scenario. Many more add levels of rape, racial fetishism, and objectivism of women so bad it makes me use the word “objectivism”.
I can’t be convinced anyone actually enjoys it, because when allowed to describe the appeal, they focus on how bad the cucked person feels, and yes, inserting as that role. The lack of enjoyment, is apparently the whole point.