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Generally, biologically speaking:

Men have a urethra and an anus.

Women have a urethra, and anus, and a vagina.

Presumably, discounting mutations, birth defects, serious injuries, etc, most people have the same number of uh… head/face holes.

…

Allowing for rarer cases:

Also… intersex people exist… there have been at least a few recorded instances of duplicate and/or forking dongs…

And I guess we could also consider varying kinds of conjoined twins.

…

Also also, we could argue about whether milk producing mammaries constitute a topological ‘hole’.

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Skullgrid@lemmy.world ⁨1⁩ ⁨day⁩ ago
en.wikipedia.org/wiki/Homeomorphism

Vaginas, milk ducts, pores, etc in a topological sense, are not holes, just dents, like the recepticle part of a cup with a handle.

I mentioned noses and ears before deleting them, because the ENT region is really complicated for a non topologist/biologist to be able to tell if they can be interpreted as holes or not. Luckily for me in this discussion the system is identical for men and women.

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- sp3ctr4l@lemmy.dbzer0.com ⁨1⁩ ⁨day⁩ ago
  Derp.
  
  Looks like I need to complexify the manifolds of my brain, haha!
  
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Cris_Color@lemmy.world ⁨1⁩ ⁨day⁩ ago
I think their point was that the hole has to go all the way though for it to count topologically

The vagina ends at the uterus, and milk ducts don’t go all the way through either

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- Skullgrid@lemmy.world ⁨1⁩ ⁨day⁩ ago
  100% correct, thank you.
  
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  - anzo@programming.dev ⁨1⁩ ⁨day⁩ ago
    Urethra doesn’t go anywhere either except for bladder, then nephrons (kidneys)…
    
    Something similar applies to ears, right? And nose… But,
    
    Also, what about the pores in my skin? :O
    
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    Skullgrid@lemmy.world ⁨23⁩ ⁨hours⁩ ago
    The problem is the nostrils.if it was just an indentation into the lungs, it’s one hole: digestive tract.
    
    The nostrils divide the breathing passage into two, then join up again. From the air to the lungs is an indentation, but does the tissue separating the nostrils create two separate complete topographic holes?
    
    Same for the ears; where do they join in on this system? Idfk, I’m not a doctor or a topologist
    
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