>>81983I just explained that. Semen has anti bacterial properties that clean out the Urethra.
>>81986Urine doesn't have anti bacterial properties. Although sterile when passing out of the proximal distal tubule, it carries bacteria once it exits the collecting ducts and passes through the ureters to the urethra. That's how we can detect STI with a piss test.
>>81989You're assuming they have no nocturnal or other transmission of seminal fluid.
>>81992t. med student.
