I hope this is not too geekey.
The salinity of tears is around 9000 ppm dependant on body hydration. Body salinity is around 9000 ppm or isotonic at 0.9%. The ocean is around 0.35 % or 35000 ppm dependent on depth and temperature. Most salt used on the roads is Calcium Chloride witch is more corrosive than Sodium Chloride.
The reason cars and boats have more problems are higher concretions and other metals involved.
The reason it fells better is osmosis. Water is constantly trying to balance itself. You have less osmotic pressure at higher concretions of salt in your pool. Less water in to the skin means less flaking and itching. Think of it this way, you have a dead layer of skin at the surface the epidermis, as water enters these cells they swell and burst , when you get out of the pool these busted cells dry quickly, and cause itching and flaking. In salted water these cells have longer before they burst. The higher the salt levels to isotonic the less damage to the cell membrane.
I haven’t salted my pool yet but I do plan to as I learn the BBB chem. method better.
Later
Steve