Corrected entry: In the episode about the sex education, when Mr. Mackey is talking to Miss Chokesondick he says his head kept growing and growing but his body stayed normal, yet in the episode when he becomes a hippy he takes off his tie meaning his tie made his head big.
gandolfs dad
15th Oct 2003
Correction: It is perfectly possible that Mr. Mackey has been wearing a tie since childhood, and never took it off. After all, it's South Park, and there are a lot of weird things going on there (like characters never changing their clothes and the town being destroyed a few times a month).