Without tempting the moderators...all this happened way back MANY decades ago...different era....I was a teenager, working a summer job at an uncle/aunt's business. The guy was a HUGE tall/big black guy I had known since I was a toddler....really a great, kind, congenial, nice person...gentle giant comes to mind...and he worked sometimes on my paternal grandfathers farm during seasons the help was needed...and when he wasn't on the farm, he worked at the business just a few blocks from his house. Often the only people working at the warehouses were he and I. The guy's wife used to bring him lunch and then in the back of the furthest warehouse (it was a moving and storage/warehouse company with several connected warehouses), they would put down a bed of movers heavy padding blankets and he would fuck her for the rest of the lunch hour and more if the afternoon was slow and there was no work to be done. Watched them fuck many times. I had seen bigger in my family, but his was the first giant sized black endowment I had ever seen. I eventually heard that he fucked my paternal aunt from time to time in that warehouse, but I was not involved in that. As that seemed to have happened most during the winter months. And he and his wife occasionally were involved on the farm with my paternal grandparents.
But back to he and his wife...eventually watching he and his wife fuck one afternoon, I pulled mine out and was stroking off and from that his wife even compared us from time to time...first time that ever happened where I was "compared" to another guy....and eventually after several summers, and Saturday part time jobs, one summer afternoon she took me on too...which was the first time I ever did a 3sum...did many with them for "lunch break" after that.
As a side note, she and they were "swingers" but that was not really the term. They just fucked others. Lots of women in the area fucked him and she knew of it or participated with some other couples. And many years later, about two decades plus, I heard that he had put his humongous pole deep in a young built like a brick shit house black woman, and when he got home his wife snapped and put a huge butcher knife in his chest. Sad has I had known him since I was a toddler and he was a truly kind man to me.