The child was conditioned by the parents to behave that way. The child learned that if they kept asking they would get what they wanted.
When I took care of my nieces and nephews they tried that on me. They got tired of it and stopped. To this day they know I say what I mean. We have a good relationship because of it.
Sometimes death is not as tragic as not knowing how to live. This man knew how to live--and how to make others glad they were living. - Jack Benny at Nat King Cole's funeral