It Really Doesn't Matter, Or Does It?

Do enjoy reading these stories, but intrigued by the fascination of mentioning penis size and whether you're circumcised.

So many stories of "my 7inch cut cock got hard"; or "I put my uncut 12incher in her mouth."

I assume it's an American thing. No one in real life talks about whether they're circumcised. Why does it hold relevance to Americans? Actually asking.