Pudendal nerve
The
pudendal nerve is responsible for
orgasm,
urination, and
defecation in both sexes. The pudendal nerve innervates the
penis and
clitoris,
bulbospongiosus and ischiocavernosus muscles, and areas around the perineum. At sexual climax, the spasms in the bulbospongiosus and ischiocavernous results in ejaculation in the male and most of the feelings of
orgasm in both sexes. Difficult
childbirth or cycling can compress or stretch the pudendal nerve - though permanent injury is rare.