I dont think anyone has ever asked me that question before. The nurses at the hospital where my DS was born were very supportive and happy to hear I was not circing him.
They said that they didnt have a doctor on site that did it and they have to make special arrangements to do it. That was at least "nice" to hear, that it wasnt just "routine."
However a lot of dr's are still ignorant about the care of intact boys, I actually had a new male dr. start to try and retract my son's foreskin. I jumped up and was like, "Stop, you dont need to do that, stop!" I was so mortified and shocked, he really believed that this was something he needed to do, honestly it felt creepy.
Needless to say we never went back there again.
I thought it was ironic that my female dr knew that an intact penis did not need any special care, but a male dr was totally clueless.
As far as the OP, if they ask you, maybe they are looking for reassurance, ie *hoping* you had your son circ'ed, it would be like your decision meant theirs was a good one. In that case it wouldnt matter what you said (since you left your baby alone), theyd probably be hurt, since the question wasnt really about you but about them, or they could actually want information but Im a cynic like that.
I remember way before I became a mother and my brother was watching my nephew getting circ'ed and how stressed my brother was. I thought it was really sad, but didnt really "get" the whole circ situation yet. Back then it seemed "normal", now it seems crazy.
All that stress and pain for what really? sigh oh well what's done is done.
My DF said a long time ago before I was pregnant that he'd want his son's to be circed, but I think time has softened his thick skull. Either way there's no way in hell my baby (sex unknown) will be cut up for no reason.
His rationale was something about men in Africa and AIDS.
Yes that sounds perfectly reasonable to me.
I think since you are truly concerned more about getting the question/answer over with and not hurting anyones feelings, just say you didnt see a reason to do it and leave it at that (as others have suggested). If they push you after that, well imo they are asking for it.
I still think it's an odd question, and it seems like someone is either fishing (for info, confirmation, whatever) or judging or both.