Used to describe a person that is very polite or Charming for their own gain
Example Business people can be charming or "Sweet" to customers.If customers see them as igornant or "Sour" they will not shop there Hence the phrase Ya wont catch Flies with Vinegar
Problem Exists Between Keyboard And Chair
Usually used to describe a "Computer Problem" when there isn't one. Its just that the user is not Computer Literate.