Today I realized Bitty1, my first born, calls me "mom" and Bitty2 calls me "mommy."  After the 20 thousandth "mom/mommy" of the day I told the boys "Shhh!  I don't want to hear the word mommy for 10 whole minutes."  Bitty1 thought that statement only applied to Bitty2, because he calls me mom,  and continued to talk.