I was in the bathroom with Sarah putting on makeup and she was being her silly self so I said "Are you my silly bug?"
Sarah: I'm not a bug!
Me: Well sometimes we say things that sound cute to people but they really aren't those things. It's called a term of endearment. Like if I call you "honey" I don't really think you're honey - or if Daddy calls me "kitty" he doesn't think I'm actually a kitty.
Sarah: Or if Daddy calls you lightbulb?
Me: ...*sighs and decides it's not worth correcting* yes, or when Daddy calls me a lightbulb o.O