When we were growing up we lived in a house with an old coal fired boiler. At one point the boiler was replaced with a new gas boiler so the coal bunker in the back of the basement was no longer used. Since it was so dirty inside the family decided it was not a good place to store things so it sat empty for a few years. Then when I started playing with myself I knew I needed a private place to enjoy my body. The coal bunker was perfect, it had a big iron door that opened up into the side wall of the house and a smaller door inside the basement where the coal came out and went to the old boiler.
I would climb inside and play with myself and then go outside and try to act normal. My mother was upset because my pants were ruined from sitting in the coal dust and she forbade me from going into the coal bunker. So my dad bolted the inside door shut. Then I started climbing down into the coal bunker from the outside. Still I got in trouble for getting my clothes dirty. Then I got a brilliant idea. I went down into my favorite place and took off all my clothes and carefully bagged them so they would not get dirty from the coal dust. I got carried away and started to roll around on the floor and was totally black! If I put my clothes back on now my mother will want to know how they got dirty on the inside!
I had to wait until nobody was in the yard and snuck out naked with my clothes in a bag and ran around to the other side where I tried to hose myself off and get dressed. Now I was blackened, wet and naked! My parents were so upset when they saw me. I got a beating and my dad wanted to teach me a lesson by making me stay in there naked all day. It turned out great, I beat off 4,5,6 times that day and the black coal grime was all over the soles of my feet, butt, back, legs, arms, belly and chest. That night my dad had to wash me down in the yard with the hose and a bristle brush! What did hurt when he made me scrub my cock and balls with the brush to get them clean. The next day dad had a man come and weld the outside door shut, so I had to go back to beating off at night in my room.