Already the female struggle to express your own wants rather than simply being polite? At 18 months, really? It appears that we may have over-trained the politeness. When Em starts to kind of whine for something, we say, "Use your words!" She immediately smiles sweetly and both says and signs please. Her pronunciation sounds mostly like "beese." We say please what? What do you want? And she goes through the same angelic smile and double please. And this goes on for a while. I know, some of you are thinking, "Did it ever cross your mind that she might actually want BEES?" Well, yes, but she can't have 'em anyway, so if that's what she's saying, it's easier to just misunderstand.
She also goes ahead and says "tenkyoo" when she reaches for something that she hopes you'll give her. Very optimistic.