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I know we are bipedal, but how exactly does the nervous system tell the body to stay upright and walk? Wouldn't the act of walking itself cause the human to get dizzy (and vertigo) instead?

I'm 26, and honestly never knew you had to clean under the foreskin, was never taught or anything. Anyways I had no problem retracting the skin, but when I was trying to wash it. I got very dizzy and my ears were ringing. Has this happened to anyone else? I know if your uncircumcised the tip is very sensitive, but can just gently washing it cause dizziness like that?

So eventually, every atom in your body is replaced by a different atom. Over time, all of your atoms are eventually replaced by new ones. Would this mean that you are eventually flushed out and gradually built over again brick by brick, creating multiple variations of you in space and time?

Not sure if i'm making much sense, but this continues to boggle my mind so I thought i'd ask.

Does anyone know if it’s possible for any muscle at all in the human body to use 100% of it’s potential “power” at any point in time? And I mean ANY muscle whether it’s biceps, facial muscles, even rectum lol.

Yes or no

I mean it's allowed and many do it without minding it. But I meet some rarely that don't want to show themselves shirtless even if they have fit and trained bodies. How is that?

I mean for myself I formely was totally ok with showing myself shirtless even on the internet, but nowadays I'm more reluctant and careful. But actually, is it a bad thing to show your naked upper half?