Are we talking about "legal" rights or just the title of marriage. Because as far as I know, civil unions grants the same rights as marriage. I've had no interest in the topic until recently but that's what I've learned in this thread.
Well let me first shed a tiny sliver of light on my position regarding homosexuality: yes I think people are born with their current sexual orientations (so no, I don't think it's a choice) but--as Shouta more succinctly articulated my thoughts--"I don't think that homosexuality is the standard mode for living creatures"...whereas, I DO with heterosexuality. I'd go into more detail but I'd rather not risk it because it could come across as offensive.
I've actually voted for gay marriage before because I don't have a problem with two consenting adults doing whatever they want....but I would probably abstain in the future because I'm not necessarily for or against it.
This isn't about "two consenting adults doing whatever they want."
It's about people, just like you - EXACTLY like you - who are treated as less than 100% human simply because they happen to be born with one biological difference. A biological difference that is equivalent to having a different shade of skin color, or the color of their eyes, or red hair.
You're basically saying that because being right-handed is the "normal state" and being left-handed isn't, that if for some reason our society shunned left-handed people and gave them less rights than right-handed people (for example, the right to marry), that you wouldn't "necessarily be against it."
Think about that for a second.