Yes, from our experiences, being a cuck has nothing to do with penis size or a man's ability to pleasure or please his wife. So, some enjoy small penis humiliation, but it is a small subset of us. Men whose wives enjoy sex with other men have the same penis size range as men who do not share their wives. We have a friend who is cuckolded by his wife. He is also one of my wife's bulls. He is over 7" erect and probably 5" flaccid.
Me, I am one of the cucks in that little dick club. I am also one of the guys who is smaller than most men who see themselves as "small."