It all started in college, several MMF's, fewer FFM's. After that it was mostly MMF. Frequency varied with who I was dating. With some guys it never happened, with others it was fairly routine, fairly. Wish I'd kept a diary.
Between lack of a willing partner and not moving in circles where I would be likely to find a suitable third, it has never happened. I am not averse to the idea and it is on my bucket list, but it is not likely to happen. Preferred configuration would be MMF since I am bi, but any would do and a lot would depend on the others involved.
A strange little something for Halloween.
Only once, many years ago, it was an MMF and I was a complete flop. I was inexperienced, nervous as hell and when the wife said she wanted me to fuck her ass while her husband fucked her pussy (her husband said her pussy was off limits to me), I lost my erection. This was super embarrassing for a young early to mid 20's guy. Needless to say the fantasy in my head never lived up to the reality. I think in the right circumstances with the right people today, I like to think the outcome would be more enjoyable for all.
Yes, the wife and I with the now 19 year old neighbor girl, we are in our 60's and live by her parents and she was 18 and going out with her first boyfriend that wanted a little more than just playing with her boobs so she asked my wife for advice on how to give a blowjob and a handjob, I was in the shower and when I came out the wife was using a banana to show her how to grip a cock and I asked what the heck they were doing, long story short my wife gave me a handjob and blowjob while Lizzy watched and a couple days later the wife had Lizzy give me a blowjob, I convinced them that I should get to see Lizzy naked as well so I got to play with her boobs while she sucked my cock. A couple weeks later my wife let me eat Lizzy's pussy to show her what that should feel like. Have not seen her for about a month now but the wife says she is coming over next weekend to see her parents and us