Here's a funny thing my mom friends and I all do: we all say apologize profusely to each other when our kid is mooching snacks from their kid. It doesn't matter that their kid chowed all of our graham crackers and goldfish the last time we got together, or that we consider toddler snacks to be community food and pack accordingly. We all get together at least twice a week, so there's plenty of "snack payback time." Not that anyone's keeping score...I don't think? I'm not anyway. (I guess I did once see a mom friend refuse to share her child's snacks.) I'm all for manners and courtesy, but I think a few snacks borrowed and shared between friends needs no apology :) What do you think?