With MF /FM I mean that both partners can switch roles. Now with most poses, the initiative is one-sided. Like the gentle foreplay where the male pleasures the woman. In my suggestion, the two involved can switch roles.
And wherever I write MF or FM, it can just as well be FF, MM, SS, etc. As it has been said very often: a lot of FM poses are convertible to FF/MM poses. And I have always shown my support to the gay members. There should be more poses for them!
@Fantasy thank you