When I was growing up, we were required to say thank you at the table twice, though we were not limited to just twice, if we were so moved. When we sat down, we said, "Thanks, Mom. This looks great!" Before excusing ourselves and taking our plates to the dishwasher, we reiterated, "Thanks, Mom. That was delicious!" Did we always do it without prompting? I'm sure we did not, but our father would remind us. And it really wasn't about whether or not we liked peas. The thanks was for the effort and the love that went into preparing the meal.