Because if they had one more, they would be 240.
Cake.
Hey, are you Jamaican a cake?
An Envelope EDIT: My deepest Canadian apologies to those who are calling this a riddle. I always took it as a cheesy joke
It's CoRnY
Because one more would be too farty
Because one more, and it'd be too farty.
Because one more, and it would be too-farty.
Because one more would be "two-fahrty"