Four reasonable ideas and a joke (humming? Come on don't be ridiculous)
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No joke: Singing/humming legit stimulates vagal nerve function, and healthy vagal function is required for a healthy nervous system.

And you don’t even have to be in tune to get benefits.

(You must be real fun at parties.)
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I don't actually have any problem with self-soothing humming, I just had to pick one of the non-impeachment options to say was ridiculous in order to make the joke work
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Humming and whistling are extraordinarily harmful to my ears. I choose “E” as the right answer in this multiple choice. For sure, it’s “E”. Final answer.
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Humming immediately quiets the voice in your head. Try it!
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I don't actually have any problem with self-soothing humming, I just had to pick one of the non-impeachment options to say was ridiculous in order to make the joke work
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Agreed.
Humming gives me a headache...
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