When this all started, us talking of her being with a well endowed black man, I was candid and confessed I admired how big black men were and could easily understand why she would find a hung black man arousing.
In my eagerness to lavish praise on how sexually dominate black men were I sometimes referred to how much bigger they were than me but never talked of humiliation, in fact I told her I was not into extreme humiliation like other cucks in this lifestyle.
Well, one night while we were talking about Isaac my wife was describing about how she and him would be in bed with me watching and out of nowhere she said "I will take his big black dick in my hands then stop and look at you tell you how much bigger his dick is compared to yours."
Fuck, I never wanted that and it made me cringe, however when she said that to me I got so excited I pulled my cock out of my underwear and started stroking it in front of her. She looked at me and asked "you like that don't you" and I answered yes as my mind raced about what she was doing. She asked rhetorically, "you know he is going to much bigger than you, right?" and again I said yes.
In a span of a few sentences I was turned into a cuck by her! She then said "next I'm going to start sucking Isaac's big black dick and as I do I am going to stare at you, then stop, and tell you that his dick is enormous." After that everything was a blur because I shot my load.
My wife somehow knew that by saying Isaac's dick was bigger than mine to me it was going to strike a chord somewhere. She was not humiliating me but being candid as I've always asked her to be, I just never realized there could be a difference but as a wife she knew exactly what to say and the reasons we are doing this in the first place are not going to be avoided .
NOTE: I am not "small" but I am not huge like the black men I want my wife to sleep with so "small penis humiliation" really does not apply.