Became a full time nude sleeper in my mid-30's after many years of gradually wearing less and less in bed.
While I was occasionally nude at home and at the beach, dis not spend a significant amount of waking time nude for another 20 years or so.
Started around the same age; 12. Began sleeping nude always at 14 and that's when I also stopped wearing underwear. I told my mother that I'd do my own laundry so she didn't ask questions about the lack of underwear in my hamper. She didn't complain! hahaha
Ive been sleeping naked since I was 13... as kids do I had sleep overs and gone for sleep overs and slept naked as well. Some of my friends already slept that way and we used to all skinny dip together so weve already seen each other naked on numerous occasions...