My son the con-artist.  Don't get me wrong, I love the guy but he is and always has been a little con-artist.  It started when he was a baby.  Most babies by 4 months are holding or trying to hold their own bottles, not my son.  He wouldn't even try.  And before you think that I just took over too quickly, know this, everyone who ever watched my son said the same thing.  He would rather cry, scream, whimper, and put than pick up his own bottle.  Yes I waited, 10, 15 30 and even up to an hour and he wouldn't even try!  This has translated, as he gets older to other things.
For example, let's take today.  He decides that he will ride with my mother when we pick up my care from the repair shop.  My mother has to make a couple of stops before she comes home.  One of those stops is at Wally World.  My son tells my Mother that I forgot to pick up a 24 pack of Coke for him yesterday when I was at the store.  He asks her to pick it up and I will pay her back when they get home.  Thank Goodness my Mom knows him well.  There is no way I would pick him up a large pack of Coke and he knows it.  Both kids get one 2liter of Coke Zero or Sprite, about once every month and that is it.  Why?  Because that is all they will drink and will drink it up in an hour if they are not watched.  He knows this and knows why they can't have it.
I know this doesn't seem like much of an example of a con-artist, but trust me, this is just one small example of a long list of things he has done.  I hope that my continued vigilance on his behavior will teach him good lessons for later in life.  Right now I just have my hands full making sure that he doesn't get away with it.