Whenever I poop, the very last thing to occur is a stream of urine out the penis. Here's the question.

What is the reason, cause, purpose for the pee at the end of pooping? No matter how little pee I have in my bladder, there's always enough there to satisfy the period at the end of the sentence at poop time.

What is that physical/physiological signal sent to the urethra and bladder that makes certain that my body knows that this poop is completed?

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I like; a) taint brushing: b) a good cigar: c) our juices together; d) champagne: e) protein squirts; f)more of these; g)much more of these; h) Damn, slide that thing into me. Deep!
Adage: 2 things are certain in life; Death & Taxes. Therefore; God & Beelzebub had a meeting to fix the problem. A mighty storm prevailed for ages until finally they ended the storm with the agreement: From now on Anyone whom chooses doesn't have to die. "Everyone wins said Beelzebub. You get an eternally grateful bunch of worshippers praying forever for lower taxes as I goad & prod them forever with higher & higher taxation."