I have a sister 10 years older than I. She would have to babysit me when I was little and she always had her friends over for slumber parties. Oh, the things this kid saw. All these 15-17 year old girls in their nighties and panties. It was a beautiful thing to behold. Some of those memories are permanently burned into my brain.
When I was a kid, just when the UHF stations were becoming popular, we had a local channel that was set on 51. If you had a B&W TV with the fine tuning ring on the outside of the channel selector, after 10 pm you could tune to channel 51, then carefully rotate the knob to an off frequency channel known as On TV. There was video, but no audio. As a kid of 14 or 15, you didn't care about the audio. You had first class porn to watch.
The smaller the TV, the better the picture. I had a little 13" B&W that pulled it in perfectly with the round UHF loop antenna. I would sit in my room spanking my best buddy raw at night watching those flicks. Eventually, someone caught on about it and On TV got encrypted, but you could still see some good stuff if you watched between the horizontal lines on the screen. It wasn't very clear, but you could still catch a hairy pussy or a tit and that's all it took at that age.
Life was so fun and simple then.