Transcript:
Wally: Rowf (x8) Grrr...
Norman: Wally's funny. He saw a squirrel in that tree five years ago! So now every time we walk by here, he stops and barks! I guess animals never forget certain things! What's dad doing?
June: He lost a dollar over there in 1982!
The apron is just part of the character. Charlie Brown never changes his shirt, either :~)