Why pregnant women crave pickles!

I have been craving pickles A LOT more than usual. Along with lime and salt on or in EVERYTHING! Which brought me to wonder why the stereotypical joke is about pregnant women craving pickles is all about. Well when we get pregnant our body craves water and salty food -which we confuse for pickle craving- to help us retain this water so the baby can use when he/she needs it. Also the acidity and taste of pickles helps settle our nauseous tummies. So now you know we don't crave pickles we crave salty just happens that pickles are the salty tasting food we think of.