Ive posted about this before.
When my older partner couldnt hook up with me, when his extended family stayed with him during lockdown of the pandemic, he farmed me out to an older gay mate in his 70s. He definitely was a very horny man and knew what he liked and wanted. Very masculine, dominating and controlling. Sexually it was like an aphrodisiac for me.
The more interesting aspect, is that I turned up to his house, literally on a "blind hookup". I had no idea what he looked like and he similarly had no idea what I looked like. My partner just told me to go to this address and I obeyed. I suspect though my partner must have told his mate a lot about me and what we did and what I liked. His mate was very good, if anything a bit too rough and aggressive lol, which I enjoyed having boundaries crossed, a pleasant surprise.
I was nervous when I arrived at his place, but he plyed me with alcohol and openly spiked my drinks and I was very relaxed afterwards. Even though I didnt know him, my fuckbuddy vouched for this guy and to trust him like how I had trusted him. While I didnt need the drinks, it definitely made me feel very comfortable at ease, so there was no issues with what he did to make me feel safe.
I recently had a similar experience of being ' farmed out' but it all happened at my FBs house. He is totally dom and not my usual type of hook up, but sex with him has always been amazing. I was lying in his bed a few months ago, totally spent at the end of a three hour session, discussing when we're both next free for a rematch. He mentioned that if I wanted, there was another guy he could ask to join us. He described this guy as a passive top, so he, the host, would still be in control. He told me this other guy would be allowed to fuck me, but he'd be wearing a condom. The whole scenario sounded really hot, so I said yes.
About a month later I turned up at his house, my heart beating a little faster than usual. My FB greeted me and gave me no indication that the other guy was there. I got undressed and started our usual session. He likes to rim me and does it in a kind of ritualistic way. He has me on all fours on his bed, ass really high and exposed, and usually makes me wait like this for several minutes while he undresses in another room. Only this time, instead of him coming in, it's the new guy. He really vigorously starts lapping at my hole, with the host standing nearby encouraging him.
The whole session progresses along these lines, the invited guy using different toys on me, positioning me, fingering me, all at the host's direction. The host, my FB, never touches me throughout. The whole feeling was amazing and totally unique to anything I'd experienced before. True to his word, when he could see I was aching for action, he told the visitor to put on a condom, told me to lie back, knees to my chest, and he then let the guy fuck me until he came. My FB always has this thing that I eat his cum and then my own. This time I had three lots. Firstly, he wanks himself off into my mouth, then he squeezes out the contents of the condom. Finally, he gets the visitor to stroke me off and I get to clean up my own load from his chest.
It was just like you say, although I didn't know this other guy, I felt totally safe, because my FB was in control. And because I knew him so well, I had complete faith, complete trust.