Hahaha This is a good one... Nothing under 5.5 and nothing over 8... I have only had one perfect one in my sex career and he was about 7 and girthy but not too girthy... lol I am blushing hard core at work... luckily I am alone in my office.... I have not had many as I have always been in long term relationships but I had a bf for 4 years that was about 4 and I was dying... not in a good way. It is also the shape and how it sits when erect. And the head... and of course if you know how to move it. The one thing that bothered me about Mr Perfect Penis, lol, was that he would get so turned on when I was turned on that he had to stop for a sec and it would make me lose my momentum.