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• LilB0kChoy@piefed.social ⁨3⁩ ⁨weeks⁩ ago

  Fluid dynamics.

  As the urine travels down your urethra it is under almost equal pressure from all sides. As the liquid escapes it loses contact with the vessel.

  Through a process called adhesion the water in your product will experience a drag effect as the contact with the waste channel is extinguished. This drag is greatest in areas that contain the most perturbation.

  The shape of the orifice that produces the stream produces the vast majority of the perturbative influence.

  In this case the opening is a slit which produces semi-toroidal flows in the medium at the polar vertices.

  Combine these forces (The sudden loss of pressure, the semi-toroidal flows, and adhesion) and the net effect is a torsion force on the stream.

  The torsion force impels the fluid to twist and cohesion (water molecules are kind of like tiny magnets and really want to stick together) keeps the stream together.

  There you have it. Why your urine spirals instead of just flowing out like a garden hose.

  The spongy urethra runs along the length of the penis on its ventral (underneath) surface.... This produces a spiral stream of urine and has the effect of cleaning the external urethral meatus. The lack of an equivalent mechanism in the female urethra partly explains why urinary tract infections occur so much more frequently in females.

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  • flandish@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

    ohhh til. thanks. good bot.

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    • LilB0kChoy@piefed.social ⁨3⁩ ⁨weeks⁩ ago

      Beep boop bloop! 🤖

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  • TriflingToad@sh.itjust.works ⁨3⁩ ⁨weeks⁩ ago

    I don’t see how that’s related to women also being able to piss standing up, but I appreciate the lesson in piss fluid dynamics 👍

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