Every situation will always be different and carry different dynamics with it. I have always been a cuck, but back in 2012, I quickly found myself amid a couple where I was the BULL, and the husband was the cuckold. The husband had no less than 90 lbs of lean muscle mass on me, and his cock could easily make four or maybe five of mine. The relationship continued for just over four years until my wife pulled me back, saying she needed me to be there with her as her sub cuck.
Being a cuck has nothing to do with a man's cock! It has everything to do with his mindset and his wife's desires.