Branch of the sacral plexus that innervates the skin of the penis and scrotum in the male, and skin of the clitoris, labia majora, labia minora, and lower vagina in the female, as well as the muscles of the perineum.

The pudendal nerve has the spinal components of S2-S4 (sacral vertebrae 2, 3, and 4, for the non-biologist).

Basically, this is a very important nerve.