Spanking and whipping are disciplines who many people use without keep in mind it
      could be dangerous, and not as people think it depend by the instrument adopted 
      and the intensity of the punishments. It's a big mistake!
  
      Usually the hands or the paddle is used for spanking, different is about whipping
      the most famous is with no doubt cat-o-nine tail, the riding crop, various kind of
      floggers with different hardness of material done. The bullwhip must be handle with
      big caution knowing the damages that provokes if used in heavy and/or wrong way. 
      Use bullwhip only if you're already an expert and always with shrewdness.  

      The spanking is easy and safe to do because you use the hand hitting the body and 
      touching the skin you have the situation under control constantly.  

      When you'll be an expert you can try various instruments and handle the situation
      with safety but some kind of handmade whips with tails of hard leather or other 
      hard material bad cutten (this often happen to who build by theirselves) hitting 
      strongly the body have the same result of a knife cut.  

      The same attention when use a 'cane' a wrong way could results serious damages.  
      Avoid other unusual but dangerous materials and instruments as whips constructed
      by electrical threads or iron thread etc...  

      Always ask the condition of health of the sub before to act and keep attention to
      all details also when the situation seems to be easy and ok.
      The base of BDSM SSC sound like this one!  

      The following images show you the areas of the human body, red area are dangerous
      the yellow can be involved but with caution, green are considered safe.