You might remember that Sesame Street song which goes: "One of these things is not like the others, one of these things just doesn't belong..." (etc etc).
Well, look at the mugs gallery above. All four are colourful characters. All four also have extremely square jaws. But only one of them is my son, making him not like the others (can you see what I did there?)
I've noticed this about Jamie recently; he's got a long, slender body but also a really square jaw.
I see this as a definite advantage, particularly should he ever get in a fight in later life (and I very much hope not). But anyway, there you are.
Can you guess which one is him? You're only allowed four goes.