Just this last week I have come aware that Matthew has trained Zack! For as long as I can remember Matthew has always asked if he can have a bite of Zack's food. If Zack is having pizza, he asks if he can have the crust. If Zack is having spaghetti, Matthew always asks "Are you going to finish that?" and so on. Now usually Zack says "No, you can't have any!" but then he always ends up giving Matthew the rest of his food or at least the last little bit.
Well now I have noticed that even if Matthew is not around, Zack cannot finish his food. He always leaves at least one bite left on his plate, always! I never have noticed it before because Matthew is always there to finish it for Zack but now that Matthew is rarely home I realize that Zack never finishes his meal, even if its his favorite food. Matthew has trained him to leave the last bite for him and now Zack cannot eat the whole of anything! The power of an older sibling!