When I was a kid I saw a lot of porn. There were hidden places full of magazines all over the place. My general rule said that watching porn on video was ok as long as the lights were off and I wore sunglasses. (blocks the UV porn rays). I grew up different than you.
By age 10 I considered myself quite the sex expert and decided it was time to put the information I had into practice, but since real girls were not an option I had to think of another way. I had seen in the backs of magazines, advertisements for sex dolls but I'd never be able to hide that from my mom. I was intrigued by the "Realistic, Life-like" toys that claimed to "feel just like the real thing". Problem was I was 10 and had no money, my birthday money was spent on a Commodore 64 and unless I could fuck that somehow I was going to have to improvise.... After looking at the various ads and the girls in the magazine, I decided I could figure something out, after all I was a smart kid and good with tools. I was going to make a fake vagina except I didn't say vagina and I just thought it, I didn't go around talking about making replica parts of the female anatomy.
About 15 minutes later I had a prototype ready to use. It was a paper cup with the bottom cut out. I felt that in order to be realistic I needed it to have something that looked like pubes so I took yellow pipe cleaners (she was a blonde) and twisted them into a circle that I placed on the outer part of the cups bottom. Since I could tell from pictures that I was probably soft inside I stuffed the cup with the softest stuff in the house, cottonballs. I was ready to have sex. Unfortunately, being 10 I had no real ability to have sex, even with a homemade sex toy. I stood there for a few minutes with my penis inside a paper cup full of cottonballs with some pipecleaners on it but nothing happened. I suppose that I should have kept on trying but that was my first and last attempt at fashioning such a device. Eventually I learned to take care of things without devices. Years later after actually having sex I realized the flaws of my original design but it was too late to go back and try again. I doubt anyone else has such a failed attempt.