The sympathetic innervation for that penis comes from the T11-L1 segments with the spinal wire. These nerves synapse with the sympathetic trunk, which provides off the postganglionic sympathetic fibers that go through the pelvic plexus and sign up for the cavernous nerve. [6] Erection subsides when parasympathetic stimulation is discontinued; https://dominicknqpol.csublogs.com/42655393/service-no-further-a-mystery