My Bi past makes me want to be a cuck

My wife knows I have a bisexual past. I used to be quite overweight and the only way I could get sex was to be a submissive slut to superior men who liked to use fat guys. I have sucked a lot of cock in my life, I loved the submissivenes and offense I felt especially when the men mocked me for being a fat faggot. Then I lost the weight and was able to get an attractive woman to marry me and we have great sex. But part of me still longs to submit to a man and serve his cock and feel his superiority over me. The thought of sucking cock in front of my wife, of using my mouth to get a real man's cock ready to fuck my wife gets me very hard. I'd love to get the phone call that tells me to get ready, the bull is coming to fuck my wife, to answer the door naked and on my knees to welcome my wife's lover with a blow job and then clean them both up after.

I have no idea how to get her to agree to this. It sounds like a great fantasy, but it also sounds like a potential disaster. I'm seeking a smart bull to help me out, start by making me submissive to him and then introducing the idea to her.