Victor/Victoria  , if I may ...Jesus said nothing of actually throwing anyone into the sea tied to a millstone  
his words were in Scripture  "  it would be better for that man if he were to be ... "   
Sort of sounds like " such a hideous event would be  that man's lucky day !!! "  
also , Jesus did not exclude women !!!  As if they would not be guilty of serious sin !
Jewish/ Hebrew  vocabulary had no abstract words and therefore required vivid picturesque expression which , in turn made for memorable lessons  .