My 11-month-old son doesn’t use a pacifier anymore; he prefers to suck his thumb. I don’t blame him, and nor am I surprised. I, myself, was a voracious thumb sucker. In fact, I loved it so much that at eight years old, I was threatened with a metal torture device disguised as orthodontia aptly called, “a crib.” It’s a metal bar with spikes cemented behind your front teeth, designed to make it impossible to comfortably suck your thumb. Terrified…