Yes, as often as possible. It did evolve over time. Since my friend worked nights and my wife was not working, the two of them had more opportunities to hook up during the day when none of our kids were home. I really found it exciting. Since his wife and I worked during the day and had kids around the rest of the time, we didn't get together that much. His wife also had other playmates she was more interested in. With everyone's knowledge it transformed into mostly threesomes with him, my wife, and me. The couple eventually switched partners permanently with another couple we knew. Everyone knew we were playing with him. A few years ago his second wife unexpectedly died and we became very close to him. We even became a non exclusive poly triad with him. A year ago he started getting close to a woman he had known when he young. She is married and her husband seems to be fine with it. They live across the country, and she has come back to visit and play with him several times. She knows my wife and I were playing with him and said she was fine with it. We've met her and she does seem nice but we stopped playing with him because we felt there was too much of a chance for drama that we didn't want to be a part of. Another part of the reason was our age. We are in our 70s and have all the aches and pains that come with age. He's about 13 years younger than me. We are still friends with him and even with his ex wife. Looking back, we have no regrets and know that what we have done has enriched our lives.