Case in point:
I use pet names with the kids all the time. I don't know why, I just do. Alicia has always been sweetie and the like, but with Alex, I started at rather a young age cooing, "Who's my little man?" Because you do that with babies, right? That gets mutated quite a bit, for example, Mr. Man gets used quite a bit in public I realized. Anyway, It became a nightly ritual thing. Tuck into bed, lean over for a kiss, and say, "Who's my little man?"
Well, Alex has transmuted it. Now that his speech is accelerating, he's started announcing to anyone who will hear, "I'm the man!"
Lesson: Beware of what you create.