Recently a fellow missionary in Malishevë purchased peanut butter, her kids love peanut butter. Not once, but twice she purchased an "already opened" jar of peanut butter. It was clear that a little finger was in the top for a taste, then the foil put back down and the lid put back on.
I think we all learned to open the jar of peanut butter and to look for a sealed top, before putting it into our cart.
P.S. Peanut butter is not available in all the stores. There are times when we can't find any for a while and then it is back in the stores...it is pretty good, and it even comes in "crunchy"...