Your comment reminds me of a scene from the old show "Three's Company": Jack (the male roommate) asks why the ditzy blonde's smaller suitcase is heavier. The answer: "Because it's smaller". This, of course, explains nothing. Then the two women open up their suitcases and explain that the larger suitcase doesn't wrinkle up the clothing, so no iron is needed, but the smaller suitcase does wrinkle the clothing so the gal with the smaller suitcase also carries an iron. The iron is what makes the smaller suitcase heavier -- and wouldn't be needed if it weren't so small.

Uh, maybe the only connection is the word "suitcase" but it's a great little idea that I have always loved.