“Mo-om,” my child cocks her head to one side to look at me. “Why are you being so emo?” The words string together so quickly they’re hard to follow: “Whyyabeingsoemo?” To be honest, I have no idea what my daughter’s accusing me of. My husband and I have four children. The oldest is 22 and our youngest is 11. We’ve been living with a teenager (or two or three) nonstop for the past nine years. But that doesn’t mean we understand them. If you can’t understand most of what your teens are saying, how they’re acting, or what they’re feeling, you’re not alone. Teenagers are fascinating, Seussian creatures. Their limbs are too big: oversized feet, hands that need new gloves before the winter’s even halfway over, elbows that swing in a thousand directions. And their feelings are also big and awkward. They’re pushing you away and pulling you back at …