2. "Fag"
Sometimes people think this word is like the "N-word." But it's not. This word is offensive no matter who says it - gay, straight, or otherwise. It's sole purpose is to be offensive. So, if you never want me to speak to you, make eye contact with you, or even acknowledge your existence any more, by all means, call me a fag.
3. "So, who's the woman in the relationship?"
This question is infuriating and the explanation why is rather long, so hang in there. We must first start with a discussion on gender. What is gender - innate or learned? Most gender studies experts will tell you that the concept of gender is a societal phenomenon, meaning gender constructs (stereotypes) are created by the society at large and then projected onto each individual in the society. For example, it seems that boys play with trucks and girls play with dolls because society says so, not because that is necessarily the toy they truly want to play with.
The next discussion involves heteronormativity. We live in a heteronormative culture, meaning it is expected, essentially from birth, that boys are attracted to girls and girls are attracted to boys. Laws of marriage are an example of heteronormativity in our government. Our culture feels compelled, then, to compare everything not conforming to heteronormativity to their heteronormative experiences and stereotypes.
This is where we get to the offensiveness of questioning a member of a gay couple as to which one of them is the "woman" in the relationship: the obvious answer, and the correct answer, is NEITHER OF THEM. One of the requirements of being gay is that both members of the gay couple must be the same gender. That's kind of the point behind identifying as such.
3.1. "But you know what I mean...one is always more feminine..."
That may sometimes be true with your heteronormative definitions of "masculine" and "feminine," but you must know by now that most gays don't care much for gender stereotypes and almost definitely don't have the same archaic and ignorant view of gender as you.
Take a moment and ask yourself if you think gender is black and white with no gray. In my opinion, there is plenty of gray area - gender is a gradient of personality characteristics and ways in which one identifies with themself. Did you know there are even some cultures that classify gays as a third gender?
In short, we don't appreciate having your heteronormative way of thought imposed on our relationships. In my case, my BOYfriend and I both identify as male, and that's that. Have some respect.