I understand the shrinkage factor in certain situations, but I don't quite believe such a big increase when you're aroused. mrman. Guys who are rumored: Billie Joe Armstrong Green Day Axl Rose Bradley Cooper Terrence Howard Montgomery Clift obviously I'm definitely forgetting some. When you say, "eight or better," your cock does not continue to grow to an even bigger erection based on whether or not you're having a good day or bad day.