I have to admit I have not done a lot overall, but this goes back a few years and it fairly complicated when mapping it all out into a narrative lol.
Basically my wife ended up in a Poly situation with another couple so we have had a few threesomes and foursomes by that point. I had mentioned to my wife a couple of years before that I have been curious about men.
I am not sure why this particular time but as we were fooling around with them my wife said basically along the lines of " I have spoken to him about what you are interested in trying and he is ok with it" his dick was close so I basically moved in and started sucking, I went for a few minutes just lips around and up and down with a tiny bit of tongue.
Both my wife and his wife were there watching me and it was hot.
The poly thing carried on for another year or so but sadly I didn't continue sucking him, I am still not sure why but I think it was to do with no one really talking about it so I got the impression no one really was that interested in that sort of thing carrying on.
That experience cemented in me that I want to keep sucking men lol, I do have another guy I see DL but it is near impossible to catch up frequently so we may get the chance ones a year if lucky. But yeah cock sucking happens with him 😉