I've done it all! Yes, I have.... Well maybe not all..
The only time I did mmf was about 11 years ago. It was with a BF and an ex BF..... Crazy huh? I was testing them... I ended dumping both of them...
I've done fff before too. That was about 4 years ago with a girl I still talk to and her lover back then. I do plan on doing that again soon. Yes I'm a perv... Proud of it!
ffm is what I like, of course I love the ladies anyway!