1970's, I lived in a back to back house, and I found out that the lady who lived at the back of my bedroom was that close I could read what was on her wall.
Sometimes her light was on when I went to bed, but she wasn't in sight. I never shut my curtains nor did she, she was in her late 50's, single. I used to sit on my bed looking into her room a few times I saw her getting undressed with big tits and a hairy pussy, then I would have a wank watching her, little did I know that every night she was watching me have a wank and shoot my load with my light on and her light off. How did I find out?
I came home from work and had a chat with her outside. I could see her light on while we were chatting, then as I was going into my room to put on my light her light went off. Then after a few minutes my light bulb blowed and her light went on. I changed the bulb, and it did it again three times, leaving it on longer or off to see if her light changed and it did. A few times I would go into my room I could see her standing in her window with her light off, my light off, but her hall light was shining in her room. She was waiting for me to get undressed and wank off in the window, which I did every night shooting my load across the room, or up the window!
Then every morning we would say hi lol....