Sorry, but I don't "rate" other fellows genitals. But the lovely astrochic may have hit the nail on the head.
Personally, I suffer from the dread disease "smallcox". I currently measure 5.5" ,,, a full inch less than in my misspent youth. See what you young studs have to look forward to?
Well you cock is not small. 5.5 inches is good size. My cock is only 5 inches in length and 4.5 in girth. When you were younger you must of had a big cock.
Oh I know that my dick is hardly "small" at 5.5", but having shrunk a whole inch with age was alarming. I know that it is still about average. The 10-12" dicks in porn movies does not help eother.
I shrunk over 3" in height in recent years, when I was 6'-2" from age 16. That too, was a bit disconcerting.