I'm sure it's because Americans have funny attitudes. Programmers, who spend lots of time sitting, should see this as a way of increasing comfort during work time. For the same reason and others (prevalence of pizza at meet ups) programmers should consider modest amounts of fiber supplements like Metamucil. (Not like a conventional laxative at all, and it enables your GI tract to handle just about anything you throw at it gracefully, so long as you get enough water.)