Ejaculation is achieved by an involuntary contraction of muscles and vessels that propel semen from the human body. The exact same tube that is definitely utilized for ejaculation, called the urethra, is likewise utilized for urination (peeing). [6] Erection subsides when parasympathetic stimulation is discontinued; baseline stimulation within the sympathetic https://caidenfghfe.targetblogs.com/35948315/penis-an-overview