My husband does once in awhile, usually when he's in a manic mode and the food is good and he was extra hungry. His brothers make fun of him for doing it to this day. I guess when he was little his dad would thump him for doing it at the dinner table. It is pretty annoying. I can see a little kid getting enthralled with their food, but grown adults appear to be pretty "strange" when they do it. I nudge hubby when he starts if we are out or with others. I don't bug him about it when we are home except for laughing at him.