Peeing on Toilet Bowl: Equal and Opposite Effects?

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Discussion Overview

The discussion revolves around the effects of men urinating in toilet bowls, particularly focusing on the potential for spray resulting from the angle of the stream hitting the bowl. Participants explore various aspects of this phenomenon, including design suggestions for toilets and urinals, the physics involved, and humorous anecdotes related to aiming and cleanliness.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Humor

Main Points Raised

  • Some participants suggest that peeing on the side of the toilet bowl may not result in spray, as they believe most drops will go downwards instead of upwards.
  • Others propose that if urine hits the water directly, it is likely to create spray that could reach above the bowl's edge.
  • A suggestion is made to design toilets with a specific area to contain spray, possibly marked with a target.
  • Newton's Third Law of motion is referenced as a principle that might explain the dynamics of the spray.
  • One participant humorously notes the challenge of aiming accurately at a fly placed in a urinal, suggesting it may not be as easy as it seems.
  • There is a discussion about the psychological urge to aim for a fly in the toilet, even if it is not real, and how this relates to male behavior.
  • Participants share anecdotes about personal experiences with urinals and the challenges of cleanliness associated with them.
  • Some express skepticism about the effectiveness of aiming strategies and the design of toilets and urinals.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the effects of urination angles and the resulting spray. Multiple competing views are presented regarding the physics involved and the design of toilet fixtures.

Contextual Notes

Discussions include varying assumptions about the shape and design of toilet bowls and urinals, as well as the impact of different materials on sound and splash. There is also a lack of resolution regarding the effectiveness of aiming strategies and the psychological factors at play.

Who May Find This Useful

This discussion may be of interest to those exploring the intersection of physics and everyday life, as well as individuals curious about toilet design and male behavior in restrooms.

MrSandman
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Hi all,

having a conversation with a lass who says that men peeing on the side of the toilet bowl results in spray coming up out of the bowl. I can imagine this beening the case if you pee straight into the water but if your stream hits the steep side of the bowl surely most errant drops will be sent downwars?

Cheers

Steve
 
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They should design them with one region specifically designed to contain the spray.

And then paint that region with a bulls-eye!
 
What happens if somebody's not a crack shot?
 
This is due to Newton's Third Law of motion
For every action, there is an equal and opposite reaction. ... , this was Newton's third law of motion.
 
Newton made laws about this too? He was so much ahead of his time.
 
Yes. he was a great scientist.
 
MrSandman said:
Hi all,

having a conversation with a lass who says that men peeing on the side of the toilet bowl results in spray coming up out of the bowl. I can imagine this beening the case if you pee straight into the water but if your stream hits the steep side of the bowl surely most errant drops will be sent downwars?

Cheers

Steve
Hi, Steve

I believe the cause of the lass' complaint is sheer jealousy.

Enjoy your next pee in peace,

Zooby
 
I want to put a urinal in my house. I had a chance to buy an antique one--it was dated, I think 1907, weighted about 200-250 lbs, and about 5 ft tall --a little too much--I like antiques; but, too bad, that one was a hair too big.

___________-

I'm looking for an old one --like Duchamp entered in the 1913 Armory show? (the art period time that made the world aware of Cubism, Dadaism, and Futurism)


http://www.geocities.com/allon_art/duchamp_fountain.jpg​

I looked --he did this in 1917 not 1913

----------------------

"In December 2004, Duchamp's Fountain was voted the most influential artwork of the 20th century by 500 selected British artworld professionals"

http://en.wikipedia.org/wiki/Fountain_(Duchamp )
 
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I've never seen a toilet with a perfectly straight, uniform surface to be able to predict what direction anything would go if it hit that surface. Though, a stream of any liquid is also not going to all follow the same trajectory that a single ping-pong ball would follow, because the rest of the stream is in the way. Take a garden hose and aim it at an angled surface and you'll see all the water does not head in the same direction, it sprays in many directions.

Anyway, cutting to the chase, I believe she's trying to inform you that you're splashing out of the toilet and you need to take your turn scrubbing. Afterall, when you're done, there's either something splashed out of the bowl or not, and this is not too hard to identify and clean if it's present. Keep a bowl brush and bottle of toilet cleaner next to the sink and give it a swish every few uses, and I bet she'll stop arguing with you about the trajectory of your urine stream. :wink:
 
  • #10
I think you're right, MB----chaos theory with a splash of Jackson Pollack
 
  • #11
rewebster said:
I think you're right, MB----chaos theory with a splash of Jackson Pollack
That would explain Jackson Pollock paintings.
 
  • #12
http://img255.imageshack.us/img255/2842/johnflylr7.png
 
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  • #13
Hey Ivan,

That is exactly what I was talking about! I note that the fly is somewhat off-center.
 
  • #14
DaleSpam said:
Hey Ivan,

That is exactly what I was talking about! I note that the fly is somewhat off-center.

I think that the fly is off-center so it does not look like a complete setup.
 
  • #15
i pee on the side so that it rebounds into the urinal.

early on in my life i discovered that when i peed in a urinal my pants would be covered in urine. this made me wary of peeing in urinals. then i took physics, discovered conservation of momentum and solved my problem.
 
  • #16
rewebster said:
I think you're right, MB----chaos theory with a splash of Jackson Pollack

Evo said:
That would explain Jackson Pollock paintings.

I don't really want Jackson Pollock's splashes if that's what they are! :bugeye:

DaleSpam said:
Hey Ivan,

That is exactly what I was talking about! I note that the fly is somewhat off-center.

Math Jeans said:
I think that the fly is off-center so it does not look like a complete setup.

Maybe the fly is off center to take into account the average guy's ability to aim. :biggrin: :devil:
 
  • #17
Moonbear said:
Maybe the fly is off center to take into account the average guy's ability to aim. :biggrin: :devil:

all we (men) need now is, that if we keep the stream on the fly, a balloon in the room inflates and --the first one that gets the balloon to pop, wins the prize
 
  • #18
rewebster said:
all we (men) need now is, that if we keep the stream on the fly, a balloon in the room inflates and --the first one that gets the balloon to pop, wins the prize

:smile: XD
 
  • #19
Toilet bowls and urinals are different objects, and need separate treatments. Sadly, I don't know if any such Unified Theory exists.

This seems have opened a floodgate, or rather a peegate, of imagination.
 
  • #20
The unified solution requires the use of a pee-brane.
 
  • #21
Ivan Seeking said:
The unified solution requires the use of a pee-brane.

:smile: ...:rolleyes: I mean...<groan!> :biggrin:
 
  • #22
Ivan Seeking said:
[Picture of a urinal with a painted fly.]
Anyone noticed a fly on certain web ads?
 
  • #23
MrSandman said:
Hi all,

having a conversation with a lass who says that men peeing on the side of the toilet bowl results in spray coming up out of the bowl. I can imagine this beening the case if you pee straight into the water but if your stream hits the steep side of the bowl surely most errant drops will be sent downwars?

Cheers

Steve

If you pee on the concave part of the bowl, there shouldn't be spray coming out of the bowl. If you pee into the water in the bowl, there should definitely be spray and it could conceivably reach higher than the edge of the bowl.

In fact, that's the purpose of the fly on the back of the urinal that Ivan noted. If you aim above the water in the bottom of the urinal, there shouldn't be any back spray (it doesn't matter exactly where you aim if the urinal has a parabolic shape - just that you not pee into the water).

By the way, if you go for the cheap PVC pipes, there's another reason not to aim for the water (or to aim for the water, depending on your attitude). Plastic PVC pipes tend to amplify the sound of pee into a toilet bowl (while the cast iron pipes subdue the sound).

There is one problem with the fly in the urinal that the designers failed to mention. You sometimes have live flies in restrooms. They're a lot harder to hit than a stationary fake fly.
 
  • #24
live praying mantis are easier to hit---they don't move very quickly
 
  • #25
BobG said:
There is one problem with the fly in the urinal that the designers failed to mention. You sometimes have live flies in restrooms. They're a lot harder to hit than a stationary fake fly.

I have to admit that I'm more intrigued by the psychology of the male of the species that ensures they will consistently opt to aim for the fly if they see one in the bowl.
 
  • #26
Moonbear said:
I have to admit that I'm more intrigued by the psychology of the male of the species that ensures they will consistently opt to aim for the fly if they see one in the bowl.

We spent some time in The Netherlands and I've used those toilets. It is odd; the urge to hit that fly is very strong. I would equate it to the urge to swat a pesky fly... and my sense is that it is because you don't want it take off and land on you after sitting in a toilet. It's your basic first strike mentality! :biggrin:

The odd thing is that even after you know that it's not a real fly, the urge is still there.
 
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  • #27
Shooting star said:
What happens if somebody's not a crack shot?

Then they're a crap shot.

Ahh toilet related humour.
 
  • #28
Kurdt said:
Then they're a crap shot.

Ahh toilet related humour.

Double yuck! Did you have to?
 
  • #29
I'm not up to reading the messages in this thread. Has anyone mentioned the tin pie plate in the hopper to give male toddlers a target. They like the sound it makes so it helps to toilet train them.
 
  • #30
I re-read this one, looking for Pollack----now, I can't get that Denver song out of my head with the 'Fly awaaaaaay' in it!
 

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