The teen was under anesthesia for the procedure but as I'm sure you realize there is always post operative pain. It can take weeks for a circumcision to fully heal.
Again as long as you think that there was no pain it's OK? And are you really comparing the pain of a diaper rash to that of circumcision?
Tell me why do many countries ban ear cropping in dogs for being inhumane and many veterinarians in this country refuse to crop ears or dock tails even though it's not illegal yet it's perfectly fine to circumcise boys?
I have someone close to me that was not circumsized and developed a severe infection when he was young. He was too embarrassed to tell anyone about it so it just got worse. He wishes every day that he was circumcized as a child.
I'm not comparing the two pains, but simply saying that children are caused pain all of the time. Most of the time they don't remember. The average person who is circumcized doesn't remember, and isn't affected by it later in life...that is of course unless their obssessed with it. I haven't given it a second thought until now, and it still doesn't bother me.