Emily told me this story from yesterday, so I thought I'd share.
Jason and Meredith were sitting on the couch. Meredith seemed to be playing a game with Jason. She'd pad his head with her hand twice, and then grab his hair and pull. To this, Jason would say "No Meredif, no eat my hair!" She'd laugh and do it again. As this went on, Em noticed that Meredith was pulling out chunks of Jason's hair. He didn't seem to mind, but Em told Jason he didn't have to let her do that. Jason's reply: "It ok, it my Meredif."