Mode of erogenous sensitivity draws cultural borders
Neonatal circumcision produces the most abstract reasoning and inclines to highly abstract monotheism. Circumcision during childhood results in a more carnal deficiency and demands certain concreteness in pleasure such as promises of a sensual paradise in the afterlife. Those who are circumcised during childhood need greater concreteness than paedocircumcised. They tend to resort to more concrete deputies of the too-abstract God such as His son or prophet.
The difference between the sensitivity, reasoning and beliefs of natural and circumcised people is greater than currently accepted. Firstly it has led to the separation of Christianity from Judaism. The difference in reasoning caused by neonatal and childhood circumcision is smaller. It made Islam emerge from Judaism 600 years later.