Because all the goodness is kept in the soap! Glycerin is a by product of the soap making process and has a pull of its own (it makes your skin feel soft) so some big companies like to take some glycerin out of their soaps and sell on to other companies that make shaving foam and other forms of body care items that leave your skin feeling soft. Handmade soap has all the glycerin left in for your benefit.
ScentyMentals handmade soaps are sourced from soapmakers that have strong ethical beliefs about their products. They are SLS free, have not been tested on animals and suitable for use on sensitive skin. Enjoy the luxury!