What appeal does cuck-humiliation have for the ladies?

My wife and I are not currently active in the cuckolding lifestyle, but when we were we dabbled a bit in the humiliation side of it, and I loved it! My wife said it was fun, but couldn't really define what she liked, or why.

So, I'm curious what ladies on here who do practice humiliation enjoy about it? Do you do it just because your cuckold wants it, or do you find personal enjoyment in it? And if so, what is that turns your on about humiliating your cuck?