why do skunks smell so bad when they spray ??

Question: why do skunks smell so bad when they spray ??
- Keywords:
  bad,
  skunk,
  smell
Asked by summer8181 to David, Luna, Probash on 24 Mar 2011 in Categories: General.
- David Pyle answered on 24 Mar 2011:
  
  The skunk spray is a mixture of organo-sulphur compounds called thiols; these have the distinctive feature of smelling very unpleasant!

Question: why do skunks smell so bad when they spray ??