Parents as a group must leave their children perpetually flummoxed by the mixed messages we continually give them.
Overheard at the supermarket:
Parent, leaning down to distraught child in stroller: "How are you doing? Would you like your ba-ba?"
Parent: "Can you say, 'Yes'?"
Reinforce improper English with one breath and encourage proper English with the next. What's a kid to say?