Nope, sorry, the little moron jokes were still very much around on the playgrounds when I was a kid in Denver in the mid-to-late 1960's. Mind you, we took moron to mean someone who was too dumb to put an ice cream cone in his mouth instead of on his forehead, so even at the age of ten I thought that they were cartoons. We moved to Omaha when I was fourteen. There I heard a lot of the same jokes (from Polish friends) as Polack jokes and was appalled!