Well, since this is a sex- and genitalia-themed sub-forum, we can't be talking about cars or beer brands as regular males do... shame, really. But, really, it's just that old competition and trying to be alpha male game... and especially on the web it's done by whipping out yer cock and showing it to the world at large, yelling "Look how big mine is!!!" BTW, mine's a little over 6 in. (15.5 cm) erect, and a little thicker than average. Wiggling bare toes (and just those), ~*Ganesha*~
Actually, old Shale did measure his recently - took a pic of it too. http://farm5.static.flickr.com/4014/4675560891_903f9cc8ae_b.jpg Of course, for the viewers of this forum I had to obscure the actual penis in the pic.
I'm in the 13.4 percentile in that survey. Like Shale I seem to remember measuring over 7 in my younger days with better plumbing. Talking about internet sizes, we had a teacher that told us 6 was the average but some boys measure from their asshole forward for that big number.
Some studies have claimed that 5.1" to 5.3" is actually average. If that's the case, then I'm about 20% larger than average! LOL
It should also be remembered that there are 3 types of 'Average'. Mean Median Mode Mean is the most commonly used, achieved by adding the totals & dividing by the number in the sample. Median is the point at the centre of the extremes. Mode is that which occurs most often. Averages will also change greatly according to the parameters used - such as age range, for instance. Whilst many males will have reached their full adult penis size by age 14-15, others may continue growing well into their late 20s.