Why does Walter Cunningham drench his lunch in molasses/syrup?

We are never told why Walter felt molasses would compliment his lunch...... but we can infer that he loves molasses, or possibly doesn't get the chance to have it very often. We might even think about it in terms that the food he gets at home might not be very appealing...... so he buries it in something he loves. None-the-less, Calpurnia's words describe the situation better than all others.....

“There’s some folks who don’t eat like us,” she whispered fiercely, “but you ain’t called on to contradict ‘em at the table when they don’t.