My wife is an avid lover of 3somes, we have a gentleman who often visits our bed a couple time a week. He and I often share intimate private time together and when she found out we were sucking and fucking each other she wanted in the party. The last 2 yrs have been amazing and always full of excitement, He is 63 and his wife is not interested in sex anymore, Does he love to suck cock, yea he does, does he love to fuck my wife, yea he does, we have an awesome time with him knowing he is clean and Disease free it’s a romper room when he is here.
I've had more mmf's than ffm's, just the way it worked out, in society I would guess that ffm's are more common, women seem to be more curious and ready to explore.
I think many guys like the idea of FMF and will brag about it but more actually get off on MFM that they admit, to their mates anyway. In my view. MFM is best, guys can separate the sex from emotions more easily (or get a thrill from the jelousy) and it is somehow supercharged sex as the girl gets multiple lots of semen. With two girls the one guy is sort of diluted.
Plus with two guys we both get chances to recover and go again without leaving her high and dry ( so to speak )
My my gf loves that and says it helps her relax, as one guy is doing her the next is getting ready. The visual stimulation of watching the other guy also helps recovery and ALL guys seem to like the the challenge of fucking a girl well in front of another guy. They want to show they can fuck her best, a completion the girl always wins.....
FMF with my wife and her friend (whom my wife had hooked up with individually) while my wife’s boyfriend watched. Problem was the other lady was not very attractive to me and didn’t do the sex stuff very well (too much noise and artificial groaning and calling me “daddy”). It was fun and memorable, but I wouldn’t look to do it with that individual again.
All things considered I don't think there's anything " common " about any of the choices . They're all outer-worldly experiences ! IMO