[six] Erection subsides when parasympathetic stimulation is discontinued; baseline stimulation in the sympathetic division on the autonomic nervous process results in constriction on the penile arteries and cavernosal sinosoids, forcing blood out in the erectile tissue via erection-similar veins which involve 1 deep dorsal vein, a pair of cavernosal veins, https://rockhard03975.ampblogs.com/the-ultimate-guide-to-rock-hard-63562411