I'm not getting the benefit of salt bars. Can someone explain the purpose, size, shape, cost, benefits, purpose, am I repeating myself? I read that people LOVE a Salt Bar....Why, How come? Do they use it all over their body like normal soap, or is it for your face, your hair as a shampoo (maybe that would be a shampoo bar), for your feet,,,(dont want to go any further) Thank you, you Awesome group..Kat