You say, "Bedtime! Bedtime!" That's not what the child hears! The child hears, "Lie down in the dark! For hours!..And don't move!..I'm locking the door now!" (c)
You probably sent the child to bed because you were just tired talking to the child. Because the child asks you questions. And this is one of the great things of having a child. You look foward to teaching this child about the world and how it works?..