I think I was either a junior or senior in HS. I would sleep nude off and on during the week, but the weekends were made for sleeping bare. That continued into college, until I had a dorm room to myself, then I slept nude all the time. The only time I went back to sleeping in shorts was in army basic training. Once out of basic training, I have been sleeping bare ever since.
I started around 8 as well and when I was 14 my parents caught me when
they came in on my birthday. It was hot out and the covers were on the
floor. My big sister was the only one with the wide eyes. My Dad told me
he did the same and my mom said she always knew and just thanked me for
keeping the laundry load down.
Strange as it may seem....I was only6 or thereabouts when I saw from my upstairs windowa next door neighbor kid of about the same age running around nude outdoors. I thought even at that age that I wanted to do that too and secretly stripped down for awhile upstairs.A few years later I saw a Walt Disney cartoon called WATER BABIES where the kids were nude. I asked my Mom if I could sleep like that and she said "OK" ! By the time I was 13, I started sleeping in thenude all of the time !
Since then I've probably only spent a handful of nights sleeping with clothes on where circumstances have forced me. Ie camping in winter!!!
It is counter-intuitive, but sleeping naked while camping in Winter is actually warmer overall and more comfortable PROVIDED your sleeping bag is actually adequate for the weather. (If you've got a slumber party bag in 20 degree weather, naked would be bad). Many non-nudist camping experts will tell you that you get more even heat distribution in your sleeping bag if you are naked.
I only wear a pull-over cap in the sleeping bag when I winter camp. I usually put a sheet inside the sleeping bag because my skin always sweats when nylon is up against it. The linen sheet keeps me off the nylon (sort of a sleeping bag within a sleeping bag.
Sometimes if it is VERY cold I will pile the clothing I plan to wear the next day on top of my bag so they are a little bit "pre-warmed" in the morning.
Starting sleeping naked senior year of college. Followed the lead of one of my housemates who slept naked. Slept naked at home after college until I got married. My wife gave some silk sleepwear, so I used that for a while. Within 6 months, I was sleeping naked again. That has been almost thirty years.