Sub here, I'm embarrassing to admit I get turned on by dominant men taking control of my wife and marriage. It's a more taboo side of cuckolding and my dirty secret, it crosses the line for many and is considered a source of shame.
I've been bullied and humiliated by my wife's Bull who behaved like a boss of me. I've swallowed my pride so he can get off feeling the big man at my expense. Truth is, my wife was turned on by him bullying me. It's not just another man she's having an affair with, but a rival to me and a bad boy.. a conqueror. There's something in the nature of cuckolding that feels so wrong but yet so right for things to be this way.
One must be careful of course, my own boundaries have been crossed in ways I never agreed to or counted on, and I did get hurt and humiliated sometimes more than I could handle, but I am a bit of a freak, so I roll with it and it's a source of great masturbatory enjoyment now that some years have passed and me and the wife are still together.