Ejaculation is reached by an involuntary contraction of muscles and vessels that propel semen from the body. Exactly the same tube that is definitely used for ejaculation, known as the urethra, is also used for urination (peeing). [six] Erection subsides when parasympathetic stimulation is discontinued; baseline stimulation with the sympathetic https://loverclinic.com/fillers-increase-penis-size/