I stopped reading after:
"Other studies on penile sensitivity did not include testing the sensitivity of the foreskin. They were also subject to cultural bias, flawed testing methods, small number of subjects, or involved men who had penile medical problems."
My father was was an atheist medical doctor when he made the decision, and he decided not to have to procedure done on my brother. When I asked him why a few years ago he said:
"I don't really remember. I wish I had gone through with it though."