We seem to adapt nicknames for some of the people we encounter along the way. The guy that took these (and many more pictures) is referred to as "jockstrap guy" when we recall times with him. He is an amatuer photographer and is always looking for things he can photograph but he had a huge fetish for jock straps. We never saw him wearing any but he always wanted me in them and even went as far as to buy me new jockstraps to pose in and wear around him. Having me pose in them for him following his directions always seem to get him very turned on so it was a win win situation for all of us. He also liked to have me bent over in front of him on the couch or in a chair and at first would never touch me but get close and jack himself off. Initially this was sort of a prelude to he and my wife getting started with me joining in for MFM play. As time went on my wife began to encourage him to spray his load of cum over my ass from behind and he really seemed to enjoy that. We went from that to one day he had purchased a few new jock straps he wanted me to model for him and he was jacking himself behind me as he had done many times previous. My wife told him he should fuck me and told him how hot it would be to watch him. He got some type of jelly out and a moment after rubbing it on me he pushed his cock inside me. Eventually he began trying to take pictures during the encounters from various angles which most did not turn out due to being highly blurred or very dark due to lighting. He did not have a studio and just used the natural lighting of the room. He also bought a sex swing that he set up in his living room, he got really into using it and incorporating bondage play and some other kinks that were really beyond our comfort level at the time. My wife eventually felt like he had become to demanding and controlling and stopped seeing him. We had fun but most the time we have a friendship with the guys we connect with and with this guy it seemed all about the sex and pushing new things.