Some polling Qs about this phenomenon:
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What do you call the repetitive, pleasurable toe-curling or flexing that at least some people do when they’re happy and relaxed?
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Do you find you do this?
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…ambidextrously?
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…simultaneous flexing, or alternating?
My answers: 1) I haven’t referred to it, 'cause I don’t know what to call it, and the whole subject is vaguely embarrassing anyway; 2) yes, often; 3) yes; 4) alternating.