I will have to say, I'm not sure if it's a matter of being thin and having a large cock, but I myself am pretty thin and the partners I've had gasp when they see the size of it. Not that I'm extremely large, but it turns them on to see me unzip and pull out my cock. My ex-girlfriend actually blushed the first time she saw it and after sex said she couldn't believe how big I was considering how thin I was. She was around 5' 8" at 175 lbs. and I stand at around 5' 10" at 125 lbs. So, I really don't know if it's true, but according to her it was so visually stimulating she was wet in no time.