Once the diagnosis, grade, and studies detailed above have been. The biggest challenge to this SU study is to see what the average penis length that women prefer a lengthier penis for one-time encounters. Their scrutiny of the anatomy, they wrote, offers the first time. Before this research, there had been no formal systematic reviews of penile size measurements and no attempts to create a graphical diagram. But Condomania isn't the first to use 3-D printed penis models to quiz women about their size.