I can't stand to use public bathrooms. For these reasons: -Possibility of acquiring some sort of disease/illness -I have to take my time using the restroom as I need to be really relaxed to use the bathroom. -I can't use the bathroom if too much is going on in the bathroom.. Such as too much noise.

Nah, I can pee when my heart rate is up. My heart was beating so hard once that you could see changes in the trajectory of the stream.

What you're talking about is a fight or flight reaction. When you feel threatened, your brain prepares for stress by shutting down unnecessary functions like digestion, bladder control, salivation, etc, and boosts heart rate and dilates your pupils and bronchi, because blood flow, air control, vision, and adrenaline distribution take priority in life threatening situations. Basically, it wasn't because your heart was beating fast that you couldn't pee, but your brain was saying "urination isn't top priority here, survival is."

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Related question: Have you ever seen someone taking a dump while running at full speed? GO

Well, everyone who I've chased through the woods with an axe has peed themselves. Judging by their screams, I'd say their hearts were racing...

It means that you can't pee because you're nervous, not because of your heart rate.