Represents length of moustache, beard and sideburn
 private void AddFacialHairToCustomer(FacialHair facialHair)
 {
     _customer.FacialHair = new Models.FacialHair
     {
         Moustache = facialHair.Moustache,
         Beard     = facialHair.Beard,
         Sideburns = facialHair.Sideburns
     };
 }
 public void AddFacialHair(FacialHair facialHair)
 {
     AddFacialHairToCustomer(facialHair);
 }