Does sans ever sleep?

“no. i see things, in my dreams, that i can never shake… i remember things that are best left forgotten. besides, there’s too much to do to waste time on sleep. i have a family to protect and provide for. i have to always be on watch, always hunting… always vigilant.”

He lets out a dry chuckle, shaking his skull side to side; his expression grows far away, as though looking to something in the middle distance.

“frisk used to have a saying… ‘no rest for the wicked’. it’s more applicable to me than it ever was to her.”