everybody is getting this wrong, they are trying to replace something that would be hgh coming out of your dick to make up the size of a baby.But the truth is it isnt like that yea the kidney stone is small but your penis does not get prepared to give birth to a kidney stone it doesnt swell up and strtch for the birth of a kidney stone. now I had one a year ago and the actual passing of the stone hurt but not that bad kind of like a small razer blade coming out your dick.But the real pain which makes it worse than pregnancy is the constant pain you have either in your back, side, stomache (stomache which is where mine was) it hurts really bad it does not stop it does not contract and give you any ind of relief its just constant.it can make you vomit because it hurts non stop. My Kidney stone did not pass for 5 days,I was admitted to the Hospital with pain killers through an I.V becasue the pain kllers by mouth did nothing.when it did finally pass we never saw it come out i didnt feel anything, so I question the doctor why I hadnt seen it through the strainer? went home for about 2 months I was getting uti symptoms on and off, Doctors told me I might have bladder cancer so they wanted to do test.well 2 days before I was to go to the doctors I went to pee and the pain of a razor shot through my penis, it was the stone.it got lodged in my bladder or urethra.never went to the doctors and havent had any uti symptoms since.but to sum it up its the constant pain you feel not the actual passing of the stone.