Sorry to necro this but can someone who has it please re-up?
Sally Struthers DID get tickled on the show, twice. Once, in the episode where she wears a black wig - her husband, Michael, nibbled on her neck and she screamed: "that tickles!" In another episode, when she found out she was pregnant but was sad because Michael wasn't thrilled about the news, her dad Archie tickled her to cheer her up, forcing to her to produce a winced, ticklish smile and soft giggle.
You forgot to list the best tickling scene in the entire series. In the 1978 there was an AITF episode, where Archie's brother makes his first appearance. Early in the episode, Mike and Gloria come in. Gloria's walking in front of Mike, they're joking around and suddenly he starts grabbing her butt. She reacts w/hysterical ticklish laughter while he chases her all the way into the kitchen continuing to attack that cute little hiney, and she's laughing and screaming the whole time.
I remember once on the old "Hollywood Squares" (why didn't those idiots keep their tapes!?!?!) They asked Sally Strothers a question about tickling...I think it was something along the lines of "What is the most ticklish spot on the human body?". I remember her starting her answer by stating "I'm a very ticklish person"....