Jeez, this thread has had me laughin' tonight! Lotta zingers...
I recall a study done by some urology group back in the early 90's that first challenged the "all penises are the same size" mantra that had been propagated by Masters & Johnson, and which was based on a pretty non-scientific measurement of a bunch of limp dicks.
The urologist study sampled a couple hundred guys' hard-ons. Dunno how they selected the guys, or the methodology for getting 'em to full tumescence, but they had a fair cross-section of racial groups, etc. Turned out all dicks AREN'T the same size, go figure... ask any gal who's had more'n a six-pack of partners in her lifetime.
Anyways, I'm hung like Einstein and smart as a horse.
That's my story and I'm stickin' to it. Cheers and g'nite.