It started because I admitted that my friend's newborn son's penis was the first uncircumcised one I'd ever seen. (TMI?!) After incredulous reactions by the Irish/Brits, some of them admitted that they'd never seen a circumcised one before. Who knew the Atlantic was the Great Penis Divide?
It got a little heated when they asked why we Americans circumcised anyway and my fellow American explained that it was a matter of hygiene. Friendly tip: Implying that someone's husband and sons have dirty penises is not a good idea. I also ruffled some feathers when I said that an uncircumcised teenage boy would have a very tough time in a U.S. high school. Can you imagine how fast THAT news would spread?!
When all the shouting was over, I did leave wondering why circumcision became the norm in the States while the rest of the world (save for Israel) leave their newborn penises alone.