Although these stories sound cute. I shudder when I think about my teen years when I stopped finishing sentences. My mind went on. Many of friends just accepted it, but it created awful habits where I just didn't explain well. I assumed people could see what I saw.
I *still* do that! It drives DH absolutely crazy! I have to consciously remember to verbally complete a thought and I'm sure people think I'm terribly flaky because I know I don't always remember. Even my kids have taken to finishing my sentence because otherwise they'd never know if they understood me correctly, lol.
