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 ischiocavernous 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.