Questions about gay relationship dynamics.

I'm a bi male in a relationship with a woman. I have been with guys before, but nothing resembling a long term romantic relationship. I am both sexualy and romantically attracted to both sexes.What would like to know is, is there a typical relationship dynamic with homosexuals as there is with heterosexuals?For example with straight couples the male trends to be dominant. It's not something I really agree with but it seems to be the case most times.2.Do homosexual relationships share this type of dynamic? Like is the top more masculine generally?I'm aware that all relationships are not the same, and that there is some variant involved, I just wanted to know what was typical or most common.Is it super common to have top some days and bottom other days?4. I have heard that gays are more promiscuous than straights, even when in long term situations. Or at least more relaxed when it comes to the idea of open relationships?I hope none of these questions are considered offensive. They are not meant to be as my intentions are pure curiosity. Ty