There's a candy company called: "Peter Paul". I never really thought about it before, but after all this talk of sugar causing obesity and diabetes lately, it suddenly struck me why a candy company would be called Peter Paul: It's a warning! (Or, a warning of sorts, anyway.)
You see, the people behind this candy company knew their products were going to make everyone fat and sick and stuff, and they felt a bit guilty about this, so they wanted to warn people, at least subliminally; after all, if they just came out and called the company: "Obesity Bars", nobody would buy them, and they wanted people to buy their products. But they would have felt bad if they didn't at least give people a hint about their candy's tendency to make people obese, so they put the hint in their company name: "Peter Paul".
Using the name Peter Paul is a hint because the famous painter who is so well known for painting overweight people's name is Peter Paul Rubens, after whom the word "Rubenesque", meaning a plump figure, was coined. But if they called their company Rubenesque, it would be too obvious that their candy would make you plump, so they decided on using his first and middle names instead: "Peter Paul". That way you could figure it out if you wanted to, but you could ignore it too, if you felt like it.
(Of course this is just a joke, and they probably named their company Peter Paul for no such reason whatsoever. But it is a funny coincidence that the man whose pleasingly plump painted figures inspired the word "Rubenesque" has as his first and middle name the same two names that make up the name of a famous candy company, isn't it?)
