you must have never woken up to a toddler lifting your eyelids to 'just see if you're awake', while staring you down with their face a few inches from your own. a small outlier scenario, sure, but it turns out there are very marginal situations in which you aren't controlling your eyelids (and you start to wonder whether your child was just about to kill you in your sleep or simply trying to give you a heart attack).