Salt in the wound & Oil on the fire - why (don't be evil) and when (never)
Salt in the wound ( never ) => Vinegar or alcohol in the wound (might be right) => Healing oil or water in the wound ( Ok ) Oil or alcohol on the fire ( never ) => Vinegar or water on fire (might be right) => Water on the fire ( Ok ) Conclusion: Please don't be evil and please never put "Salt in the wound" or "Oil on the fire"!