The urethra doesn’t need to be that big. Or else how would women pee?
There are instances of micro-penis. Look you can google this stuff; just be warned you may not be able to sleep well after seeing them. Nobody wants to wake up in a cold sweat agonizing. (Okay, so I’m dramatizing. I’ve just googled stuff that I regretted afterward…)
Human physiology has a wider range of variation than you might think. We’re all genetic potential, how that potential manifests has to do with genetic inheritance, nutrition, evironmental factors, disease, and let’s not forget mutation. People don’t typically grow up to be dwarves…or giants, but that potential is certainly there. Unfortunately (or fortunately, depending on what you get and how you look at it) it is the same with the penis. These instances are rare, but…they happen.
Count your blessings.
Before: I'd like to show you something I'm very proud of, but you'll have to move real close.
After: I\'d like to show you something I\'m very proud of, but you guys in the front row will have to stand back.
God gave men both a penis and a brain, but unfortunately not enough blood supply to run both at the same time. - Robin Williams (: