> A total of 744 Amazon Mechanical Turk (MTurk) participants completed an online survey using the TurkPrime interface between July and December 2017.
Circumcision has been ongoing for thousands of years. Even now there are millions of men if not tens of millions of men who were circumcised as infants.
On a population basis, it doesn't seem to cause a whole lot of problems with mental processing as circumcised men are well-represented as entrepreneurs, comedians, actors, lawyers, doctors, and pretty much every other profession.