It was starting to get close to freezing outside, and you were relaxing on your couch after a long day. You heard quick knocks on your door, qnd got up and answered it. Your friend Katie was shivering and hopping from foot to foot.

"Lemme in! My feet are super cold!"

She ran past you, into your warm house, and rubbed her feet together.

"Dude, can you, like, warm my feet up? They're kinda dirty but they're absolutely FREEZING right now. Please..."