Girls, Why do I get noticably embarrassed at the mention of a speculum?

I don't usually get embarrassed about anything (when talking about things that are potentially embarrassing I tend to take on a very practical attitude, such as using medical terms for genitalia) but when discussing a SANE exam that was done incorrectly with my caseworker, and she asked if they used a speculum, I turned beet red... Now that's bothering me... I welcome thoughts.

Girls, Why do I get noticably embarrassed at the mention of a speculum?
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