Does size really matter?

There are a variety of different ways to measure a penis, and there are a number of difficulties in doing so. First of all, a penis must be maximally erect to do so, and in a clinical setting this is difficult to achieve. At least one Brazilian doctor resorted to injecting penises with drugs to induce an erection, giving much more consistent results. Some clinicians measure the penis by stretching the flaccid penis as far as comfortably possible and take the measurement based on the theory that a fully stretched flaccid penis is equal to an erect penis length. Relying on self-reporting of penis size is problematic, since some patients exaggerate or are unable or unwilling to measure the penis correctly.