I don't remember exactly when I heard about it, but I was pretty young. My folks were telling me about when I was born. My dad was in the Air Force then, so the birth was really cheap. My dad said my birth cost them $8, but if I had been a boy, I would have been circumcised and it would have been $11.
I don't remember when I found out exactly what being circ'd meant, but I know I had the notion that it was the thing to do, and no big deal.
When I was in high school in the mid-80's, my younger (male) cousin and I were staying with our grandparents. There was a story on some news show about circ. It talked about the pain and it being medically unnecessary. My cousin and I talked and decided that we wouldn't want to circ future kids. My cousin now has a son, but I don't know if he's circ'd or not, nor have I ever known if my cousin is, but I suspect he might not be.
When I told my dad we weren't going to circ if we had a boy, he said he was glad, because he'd always wished he was like his dad. OTOH, he still talks about how I would have cost $11 if I'd been a boy.
If we ever get into a big discussion about it, I'll probably point him to info on it, but it doesn't seem all that urgent, as he's not rabidly for it.
So, anyway, at least on my dad's side, circ only lasted one generation. It's possible that his brother wasn't done - he was born a few years before my dad, who was born in 1944 - and likely that my cousin on that side wasn't - he was born in Germany and didn't live long. I think my mom's dad is intact, but I have no idea about her brother, who is the above-mentioned cousin's father. I'm proud to carry on the old