Because I have ink in my veins.
Because I love words so much that I think about them all the time. I am always either reading or writing, when not occupied with the distractions of my job (pesky) or my family (frisky). Hart Crane said, "One must be drenched in words, literally soaked in them, to have the right words form themselves into the proper pattern at the right moment." I'm appropriately drenched, then!
Because I make up stories in my head everywhere I go. Is that kid who's talking on his cell phone and grinning with delight talking to his first girlfriend, or his best male friend who, for some still-nebulous reason makes his whole face light up? And that dad with his kids in the next booth? Is he a divorced dad, or did he take the kids to lunch to give the mom some peace and quiet so she can work on her manuscript? Surely a woman dressed the little girl in that adorable crocheted capelet!
Because there are stories I want to read that haven't been written yet, so it's up to me to write them.
Because I can't stop.