Yes. I used to hang out at a friend's place all the time during high school. He had a basement bedroom so it was a great place for me to drop by to masturbate when he was in the other room watching TV. Little did I know, there was a small gap in the wall panels right next to the bed that provided a clear view from the couch he was sitting on.
I did not realize he would always watch me, until after about a year, when he finally admitted he had always been watching me and jerking off at the same time on the couch. After that I told him I would not tell anyone about our little secret if he agreed to start jerking me off a couple of times a week, while I lay completely naked on his bed. He agreed and the sessions were very hot and eventually led to him giving me my first blowjob.
I have not seen him for quite awhile, but just thinking about our sessions has the precum really flowing. Gotta stop and jerk off right now.