Question: There is something I don't understand about Linus in this special. He is flattered when Sally flirts with him by saying he says the cutest things, and that he's so intelligent. Linus usually rejects Sally's feelings whenever she flirts him. Why should this be any different?
It's the Great Pumpkin, Charlie Brown (1966)
1 question
Directed by: Bill Melendez
Starring: Peter Robbins, Sally Dryer, Cathy Steinberg, Christopher Shea, Kathy Steinberg

Continuity mistake: When Linus mails his letter to the Great Pumpkin, it can be seen that the mailbox has no writing on it. On close-ups, "U.S. MAIL" is written on the side of the box. (00:07:20)
Sally Brown: Is Linus taking me to the party?
Lucy Van Pelt: That stupid blockhead of a brother of mine is out in the pumpkin patch making his yearly fool of himself.
Violet: Boy, is he strange.
Sally Brown: But maybe there is a Great Pumpkin.
Trivia: Kathy Steinberg, the actress who voiced Sally, almost had to be replaced. Just as they were approaching the end of her recording sessions, Steinberg's mother rang executive producer Lee Mendelson one night in a panic because Kathy had a loose tooth and the gap in her teeth could cause a lisp in her voice that would sound different from the dialogue they had already recorded. The crew had to rush Steinberg into the recording studio as soon as it opened in order to get the rest of her lines on tape. Mendelson said that Steinberg's tooth dropped out as she spoke her last line.





Answer: From what I've seen, usually Sally is often annoying Linus with her flirting when he has nothing in common with her, or he's just trying to do something to help her and she tries to make it into more. Here, Sally's comments make Linus think she believes in the Great Pumpkin too, or is at least interested in hearing more about it. It's more that he's excited she likes the same thing as he does. Later in the pumpkin patch, he's happy she's there because he wants to share the experience with someone, not because he has any feeling towards Sally.
Bishop73