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Redditor ShavenRaven writes, "People kept commenting on how much hair our baby son has, so naturally this was the next step."
They're appropriate for different developmental steps. He should start out as a mad scientist (we all go through that awkward stage), then have a rebellious year with the surfer haircut, then sell out and become a greasy banker.
Finally, he should stop caring and become the creepy old man, who looks like the happiest guy in this photo.