Why do many girls squeak when they sneeze?

It is pretty obvious that it's fake. Annoyed me for a long time until one slipped up and squeaked a second after the sneeze.
Yes I purposefully squeak.
No I don't do that.
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A total of 189 votes were cast: 146 girls and 43 guys. See detailed results
Why do many girls squeak when they sneeze?
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