159 men, 91 of them circumcised, underwent touch-sensitivity tests with instruments that pressed on 11 or 17 different places on their penises with calibrated hairs. The men could not see where they were being touched.

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They found that the most sensitive part of a circumcised penis is on the scar in the middle underneath. Surprisingly, the glans was the least sensitive part of the penis in both cases, at least in regards to this fine-touch pressure test.