Why Do I Shiver When I Pee?

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iStock

Regular Floss readers know that scientists around the world study some pretty silly things. A few weeks ago, I wanted to know why spaghetti doesn't break in half. A simple Google search gave me an in-depth study of the phenomena by two physicists and plenty of charts, equations and even videos of their experiments. In our annual 10 Issue, Chris Weber wrote about the most recent batch of Ig Nobel Prize winners, who have put plenty of time and effort into things like extracting vanilla flavoring from cow dung.

Surely, on the next line, I'll present you with the results of a much-lauded study that conquered the mystery of the post-micturition convulsion syndrome (or, the "pee shivers"). But guess what?

No one has ever studied it.

Science has given us vanilla made from feces. It's discovered that Viagra aids jetlag recovery in hamsters. It's detailed the injuries that a falling coconut can cause. But for some reason, no one wants to touch the pee shivers. And so, we're left with...

THE THEORIES

The most plausible one, espoused by a number of scientists who aren't this guy, is that the shiver is a result of two parts of the autonomic nervous system (ANS) getting their streams crossed. The ANS is a control system for involuntary muscles affects things like heart and respiration rates, digestion, body temperature control and urination.

The ANS has two divisions. The sympathetic nervous system (SNS) controls bladder function, among other things. It keeps the bladder relaxed and the urethral sphincter contracted so you don't have to concentrate on not peeing your pants all day. The parasympathetic nervous system (PNS) relaxes the urethral sphincter and contracts the bladder when you decide to answer nature's call.

Part of the SNS response to a full bladder is the release of chemicals like catecholamines (which include epinephrine, norepinephrine and dopamine). When you finally grab a minute to urinate, the PNS takes over, and catecholamine production changes. Some sources point at the change in chemical production as the cause of the shiver, and others say it's the SNS to PNS switch itself that does it.

As I said, this is just a theory (and there a plenty more out there, too, like the shiver being caused by exposing your naughty bits to the colder temperature outside your pants), and no one has conducted any laboratory research to confirm it. If you've got some time on your hands this summer, maybe we can hook you up with a mental_floss grant to study this more thoroughly.

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This Course Will Teach You How to Play Guitar Like a Pro for $29

BartekSzewczyk/iStock via Getty Images
BartekSzewczyk/iStock via Getty Images

Be honest: You’ve watched a YouTube video or two in an attempt to learn how to play a song on the guitar. Whether it was through tabs or simply copying whatever you saw on the screen, the fun always ends when friends start throwing out requests for songs you have no idea how to play. So how about you actually learn how to play guitar for real this time?

It’s now possible to learn guitar from home with the Ultimate Beginner to Expert Guitar Lessons Bundle, which is currently on sale for $29. Grab that Gibson, Fender, or whatever you have handy, and learn to strum rhythms from scratch.

The strumming course will teach you how to count beats and rests to turn your hands and fingers into the perfect accompaniment for your own voice or other musicians. Then, you can take things a step further and learn advanced jamming and soloing to riff anytime, anywhere. This course will teach you to improvise across various chords and progressions so you can jump into any jam with something original. You’ll also have the chance to dive deep into the major guitar genres of bluegrass, blues, and jazz. Lessons in jam etiquette, genre history, and how to read music will separate you from a novice player.

This bundle also includes courses in ear training so you can properly identify any relative note, interval, or pitch. That way, you can play along with any song when it comes on, or even understand how to modify it into the key you’d prefer. And when the time comes to perform, be prepared with skilled hammer-ons, pull-offs, slides, bends, trills, vibrato, and fret-tapping. Not only will you learn the basic foundations of guitar, you’ll ultimately be able to develop your own style with the help of these lessons.

The Ultimate Beginner to Expert Guitar Lessons Bundle is discounted for a limited time. Act on this $29 offer now to work on those fingertip calluses and play like a pro.

 

The Ultimate Beginner to Expert Guitar Lessons Bundle - $29

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The Right Way to Clean Your Face Mask

Properly cleaning your face mask is important to keep it free of infectious material.
Properly cleaning your face mask is important to keep it free of infectious material.
mikography/iStock via Getty Images

In an effort to slow the transmission of coronavirus in public settings, health officials are advising that people unable to practice social distancing wear a cloth face mask. While not as effective at filtering respiratory droplets as medical-grade masks, cloth masks are still recommended as a practical preventative step.

Like all apparel, masks get dirty. They absorb sweat and germs, and they need to be cleaned. But how?

According to National Geographic, the best way to clean a cloth face mask is to take the same approach as the rest of your laundry—toss it in the washer. Laundry detergent is effective against coronavirus because the pathogen is encased in a layer of oily lipids and proteins. Detergents and hand soaps contain surfactants, which reduce the surface tension of the fatty layer. The surfactant molecule is attracted to oil and grease on one end and water on the other. The end that disrupts the oil bursts the coronavirus envelope apart. Tiny pods of surfactant called micelles trap and wash the remnants away. It’s this activity, not the water temperature, that kills the virus, though using a higher dryer temperature can destroy most microorganisms that might be lingering.

Bear in mind there’s a recommended way to take off your mask. Make sure your hands are clean, then pull it off using the straps behind your ears. This avoids contaminating the mask—and your face—with any pathogens that might be on your hands.

Medical-grade masks are trickier, as they’re intended to be used only once and can’t stand up to a wash cycle. If you have an N95 or paper mask, you can set it aside for several days, at which point the virus is likely to become inactive. But keep in mind that health officials still aren’t entirely sure how long coronavirus can persist on surfaces, and it’s possible for a mask to collect particles over time, increasing the viral load.

But what about the rest of your clothes? Experts say not to worry so much about disrobing the minute you get home. The coronavirus likes moisture and dries out quickly on fabrics. You need to be careful with the material covering your face, but the rest of your outfit can wait until your regularly scheduled laundry appointment.

[h/t National Geographic]