Playfulness. Studies say that a good sense of humour contributes to a longer, healthier and happier life — but never mind all that, let's do something fun! Photograph from Yimmys Yayo, via best episode ever.
P.S. This photo totally needs a caption. Thoughts?
Update: The playful photographer is Ms. Bird, and that's her adorable little dog Eloise sweetly posing! More photos of Eloise here, too. Thanks so much for the info, Annie!