Changed anatomy: After prostatectomy, men must rely on a single sphincter mechanism. This is the one that can be controlled voluntarily. An involuntary sphincter at the bladder neck is necessarily removed during radical prostatectomy. During emission and ejaculation, a coordinated contraction of the bladder neck and relaxation of the voluntary sphincter occurs. After surgery this can lead to the result described.
Answered 9/28/2016
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See below: The prostate is not involved in urination. It is along the urinary tract but is only involved with sexual function (semen ingredients). So, a man can urinate after orgasm whether or not he has a prostate.
Answered 3/6/2019
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