I wanted to draw them goofing off, and it got away from me. Born of an image I remember seeing of them on the couch together (need to find it, gotta scour the tag) and the ‘tussling’ mentioned in this ficlet by chantillxlacey that I really enjoyed.
Addon: found the picture I mentioned, by artsyfeathersartsyblog. And before I forget, credit to heilos for the eye headcanon used for human-quise!Lewis.