IV. Circumcision & Bodily Autonomy
Fine-Touch Pressure Thresholds in the Adult Penis: Sorrells et al. (2007), BJU International
The most sensitive parts of the penis are all on the foreskin.
The foreskin is not a spare flap of skin. Sorrells and colleagues mapped sensitivity across the penis and found the most sensitive areas were all on the foreskin, the exact tissue circumcision removes. A later study, Bossio 2016, found no lasting difference, and both are presented here.
Sorrells and colleagues used fine-touch pressure testing on 159 men to map where the penis is most sensitive. The most sensitive locations were all on the foreskin, specifically the ridged band where the inner and outer foreskin meet. On circumcised men, the most sensitive remaining spot was the circumcision scar. The procedure removes somewhere between a third and a half of the skin of the penis, including the tissue richest in fine-touch nerve endings.
Honesty requires the other side. In 2016 Bossio and colleagues published a study in the Journal of Urology using a different method, quantitative sensory testing on the glans and a few set points, and found no significant difference in sensitivity between circumcised and intact men. Supporters of circumcision lean on it heavily.
The two studies tested different tissue in different ways, which is most of why they disagree. What is not in dispute is the anatomy. Circumcision removes specialized, nerve-dense tissue that does not grow back.
Foreskin
Where the most sensitive sites were found
1/3 to 1/2
Of penile skin removed
No difference
Bossio 2016, the honest counterpoint
Permanent
The tissue does not regenerate
Why it matters
Reasonable studies disagree about how much sensation is lost. None of them dispute that healthy, nerve-rich tissue is cut away and never comes back.
This is one finding from the research library behind How to Birth a Mother. Everything here traces back to a study, a dataset, or a systematic review.