Fancy
Rugged outdoor
Everything else
There have been quite a few studies about penis size, some more reputable than others. Kinsey had a hard-on for penises, so to speak. It’s worth noting that in every study where men measure their own erections the average sizes are higher than in studies where men are measured by researchers. The hard data suggests that most men tend to aim too high. My own anecdotal evidence and highly unscientific research confirms this.
But average is such an impotent word when discussing the penis. According to the American Journal of Medicine the average erect penis is 15cm from top to tail. I shall use centimetres instead of inches since the numbers are bigger and that makes men very happy. According to Playboy Magazine the average length is 46cm. I don’t know if either study was questionnaire-based or hands-on. I would think that anybody who cares about accuracy would have a bone to pick with the Playboy study.