Ejaculation is accomplished by an involuntary contraction of muscles and vessels that propel semen from the human body. A similar tube that may be employed for ejaculation, called the urethra, is also useful for urination (peeing). Urination Urination is the release of urine (pee) from the body. This occurs when https://mixed-martial-arts37159.blogrelation.com/41782871/detailed-notes-on-penis