I just realized this simple phenomenon that you are describing is going to be crazy hell to actually put into words that hold any amount of texture or show that I have spent a lot of time over thinking and analyzing this prominent aspect of relationships.
But I share the same arousal from hearing my sex goddess wife, at the time, sheepishly saying that Tim's cock, the guy I mainly shared her with, was a touch bigger towards the bottom than mine. Then I took a picture of her holding both of us in her mouth at the same time and realized he was like three time bigger around than I was. LOL
I wasn't ashamed but rather very happy that she had access to a beast cock that she liked how it made her feel. A lot. Often. LOL
The mainstream cuckold dreamers over play the humiliation effect. I was always on the edge of my seat waiting to hear her exclaim that Tim rocked her world and that it was unfair that she fell in love with a guy that didn't also have a cock like Tim's.
Same animal different flavor I believe.
