My cucky husband explains it well, men with their dicks is like a man who is short in height, many wear slightly higher platforms on their shoe heels, maybe only 1.5 cm thicker but it makes them feel like a basketball player! its all in your subconscious thinking.
Personally my cuckys penis has definitely got smaller, and it is also hit and miss if he will get fully erect or just semi erect. age, weight, health, mindset all are factors. years of being told you are small, useless, below average, and watching men with penises 2-3-4 times bigger than he is fucking and satisfying me has undoubtedly made his wiener shrink! the penis is effected by many things, if its cold it will shrink, if you are nervous or scared it will shrink, if it is in pain it will shrink, so why wouldn't years of conditioning also make it shrink? its an organ not a foot or a hand.