"Matt Romney, the former Massachusetts governor's second son, told how his father would present his children with a stick of butter, telling them 'it's so rotten you have to smell it.' When they leaned down he would gleefully shove their faces into the plate.
"Mr. Romney apparently repeated the trick recently with one of his grandsons, pushing the shocked child's head into a platter of whipped cream." -- from an article in the UK Telegraph. Actually, it's a prank many of us would like to pull on Willard.