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HUMANS Science VIDEO

Why Doesn’t Your Sphincter Get Tired?

Why Doesn’t Your Sphincter Get Tired?

Keeping a muscle clenched usually tires it out eventually, but that’s not the case for sphincters, which do things a little differently.

One reply on “Why Doesn’t Your Sphincter Get Tired?”

I beg to differ. I’ve known a woman whose sphincter was so tired a catfish could hide up there.

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