"Mommy Daddy sad!" - Justin

We have pictures of Justin everywhere...on the walls, on tabletops, on our computer wallpaper, etc. Well, yesterday I moved one of our wedding pictures from hanging on the wall to a tabletop. When Justin saw the picture, he said "Mommy Daddy sad!" (even though we are smiling in the picture) I asked him why Mommy and Daddy are sad, and he said, "No see Justin. Justin bye-bye." How can I argue with that? I just told him to give Mommy and Daddy a kiss so we'd be happy. He is becoming very observant.