silly toning question

hi guys :) i have a kind of silly question about toning.
don't laugh at me! haha. here it is: does flexing help tone at all?
like, for example, you're just standing in the shower or at a bus stop. if you flex your ab muscles, would it help to tone them in any way?
thanks! :$ again, don't laugh at me haha i'm just curious!

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