Because one more, and it'd be too farty.
A 6-pack and a potato.
He stopped at 239 because if he added another one it would be 'too farty'. It would've been funnier if I could do an Irish accent.
239, because if there was 1 more it would be "Too Farty".
Because one more would be too farty
Because if you add even one more it gets "2 farty".