My kid and I were in a crowded public restroom

My kid and I were in a very crowded public restroom at a sporting arena,
after looking to the man using the urinal to his right,
my 6 year old son turns to address me on his left and exclaims,
“Daddy, that man’s wiener is a lot bigger than yours!”
The whole bathroom heard and looked immediately at me. So I put my hand around my kid and told him
“Well son, that’s because daddy isn’t aroused by men.