Lucy is a little girl who likes to play with dolls. She likes to dress them up. She likes to wheel them around in a stroller. She likes to tuck them into bed and give them kisses. It's all very sweet.
A recent birthday gift was a pair of magnetic dolls that can be dressed up in magnetic clothing much like paper dolls of yore. She loves this toy and makes daily use of it.
The other night I came home and I found one of the dolls heads. Just the head - in the living room. Lucy saw me holding it and said "this is you". Eventually, after a thorough excavation of the couch (where many treasures were uncovered), I found the body. When I showed her the body, again she said "This is you".
I'm sure there's a humorous interpretation out there.