My back never had any moles, hair, acne or anything other than it being constantly tanned. When younger from the sun. Then starting in 1982 the tanning beds which I used until my melanoma was diagnosed and removed which was only a few years ago. I was not expecting I would ever get one but that was the day I ended my years and years of daily tanning bed use and began learned to accept my overall health rather than just being a great looking tanned corpse.