Cmon Marm, I Do think it was just a joke.

But have you ever realised that when you keep holding your farts in, you ability to think or concentrate on anything is diminished coz u cant think of anything else except farting. So I guess, shitty ideas would be "illogical" as they would not have been given any previous thought, and "stupid" because u should'nt have held ur farts up in the first place. :D