T10-L3 level; mediates the sympathetic spinal cord reflex Erotic stimuli from cerebrum and stimulus from genitals Peristaltic contractions of the epididymis, vas, seminal vesicles and prostrate Posterior urethra accumulates the expulsed semen/spermatozoa and prostatic fluid


S2-S4 level; voluntary control over this phase is limited Contractions of the pelvic floor muscles Bladder neck closes and the external urinary sphincter relaxes


Pressure in the posterior urethra waxes and wanes Smooth muscle contractions of the urethral bulb and accessory sex organs takes place Pleasurable sensation felt is due to cerebral processing of the stimuli originating from the pudendal nerve