I have seen hundreds of penis .... ............ plural .. peni?
any who
No. The norm is not ( in my opinion only) 8 inches long , 5 inches thick.
In fact, the norm seems to be around 6-7 inches long, maybe 4 inches thick.
and they DO really come in all shapes and sizes.
The smallest one I have ever seen was actually flat against the scrotum, and only when erect, did it 'bump' over the top of his scrotum.
needless to say , he had no kids..