==Carl Jung== 
 Did Carl Jung really connect Pfluog and fuck/fick? It seems extremely far-fetched, without any basis in any sourced corpus.    
  Yet another possible etymology is from the Old High German word pfluog, meaning "to plow, as in a field" (similiar pronunciation 
  to ""fuk-"", the sexual euphemism being obvious). This is supported in part by a book by Carl Jung, Psychology of the 
  Unconscious: A Study of the Transformations and Symbolisms of the Libido, in which he discusses the "primitive play of words" 
  and the phallic representation of the plough, including its appearance on a vase found in an archaeological dig near Florence, 
  Italy, which depicts six ithyphallic men (erect penises) carrying a plow.