One of the primary orgasmic nerve receptors in the foreskin.  In the penis, they are concentrated in the ridged band, inner foreskin and the frenulum.

A normal foreskin contains thousands of these coiled fine-touch receptors. They are able to detect subtle changes in motion, as well as fine gradations in texture. Circumcision typically removes most of these receptors.

Reference: Wikipedia entry for Meissner's Corpuscles