Meissner's Corpuscles
Circumcision removes the most important sensory component of the foreskin - thousands of coiled fine-touch receptors called Meissner's corpuscles. Also lost are branches of the dorsal nerve, and between 10,000 and 20,000 specialized erotogenic nerve endings of several types. Together these detect subtle changes in motion and temperature, as well as fine gradations in texture.
Frenulum
The frenulum is a highly erogenous V-shaped structure on the underside of the glans that tethers the foreskin. During circumcision it is frequently either amputated with the foreskin or severed, which destroys or diminishes its sexual and physiological functions.
Dartos Fascia
Circumcision removes approximately half of this temperature-sensitive smooth muscle sheath which lies between the outer layer of skin and the corpus cavernosa.
Dorsal Nerves
The terminal branch of the pudendal nerve connects to the skin of the penis, the prepuce, the corpora cavernosa, and the glans. Destruction of these nerves is a rare but devastating complication of circumcision. If cut during circumcision, the top two-thirds of the penis will be almost completely without sensation.