answer:It’s always easier to remember things that rhyme, especially when learning a second language: jelly belly, money honey, the rain in Spain falls mainly on the plain… Dynamic Duos, so to speak, with their alliteration or rhyme (or both), roll easily off the tongue and slip effortlessly into the cobwebs of our minds and memories. Which is the point. Along those lines, there are simply things that go together as the song goes; some of them just common sense (or good marketing) and some strange, but nonetheless true: pickles and ice cream are what a pregnant woman craves – perhaps because her hormones are all haywire and she simultaneously needs both sweet and salty. But shilolo or Dr_C could better tell you the reason.