RIP Soupy Sales.
His show was must see TV in the '50s. He always pushed the edge. Two of his characters were White Fang and Black Tooth. He was teaching one or the other (can't remember the details) the alphabet, using a chalk board. Soupy wrote the letter F. Fang (or Tooth) said K. Soupy erased the F and then wrote it bigger. The hand puppet again said K. The next F took up the entire board. Again, it was read as a K. Finally an exasperated Soupy asked him: "How come everytime I write F you see K?" Spelling out fuck on a children's TV show was very brave during those puritanical times.