There are two kind of men penis, the growers and the showers. The showers are penises that will not grow tremendously during erection. The growers are penises that will grow tremendously during erection. Some men have a penis belonging to the shower group and others belonging to the grower group. Thus, it is useless to measure your flaccid penis size to compare it to others. The penis size in flaccid state is not related to the erect penis size. It is not possible to mathematically forecast the erect penis size from the flaccid penis size. Beware of the locker room syndrome, if you have a penis belonging to the grower group and when your best pal has a penis from the shower group, you cannot compare your two penises.