Fastest Erection
Erection speed is determined by many factors, such as fatigue, how much alcohol you've imbibed, the general health of the organ in question (you do include pubococcygeus curls in your daily exercise regimen, right?), and the degree of arousal. In Sexual Behavior in the Human Male (1948) Kinsey records a few remarkable individuals who could achieve erection in as little as 3 seconds.