Hi,
My DP and son are both done. Athough they are both done my now 3 y/o son is going through the curious stage and still thinks daddy is different cos his is bigger. I dont think it would be much different if one was and the other wasnt there will still be curiosity. My DS daycare has unisex toilets and i thought it would cause issues with the kids seeing different bits but it rarely causes problems except some of the girls try to stand up like the boys to go.
Its a personal decision and i know it can be a heated discussion with some people but i would just like to say when my sone got done he was in no pain at all so i would have to disagree with the telling them "it hurt so they dont do it anymore". I have friends who used that line with there son and had bad problems with infections so the GP advised they get it done he was 8 and was terrified as he remembered daddy saying it hurt so they dont do it anymore. After the surgury he was in a little pain but said himself it wasnt as bad as he thought, and that he though that cos they didnt do it anymore that it was something really aweful.
Just have to keep in mind that there are people who still get it done and its not wrong or bad (on either side)