WARNING!
Do not read this if you are easily offended.
One of the issues I had always had with the Catholic church was what I perceived to be it's stance on gay marriage. The problem with this is that my perception was not based on actual fact. Like most lazy people I hadn't bothered to research the idea behind the stance, I just took what seemed most reasonable from what I had heard from others. The problem with that is what you hear from others is generally not reliable, sometimes not reasonable, and most always not educated (not to say that people are unintelligent, the majority just don't do their homework). The lesson here is to always find out for yourself; simply taking someone's word on something is not a great idea.
I know more about the Catholic view of gay marriage than when I started down this road, but I'm not nearly as articulate with it as they are here. I have to say that all the bigoted 'Christians' that take such an emotionally charged, defensive stance in the argument are actually hurting the church rather than helping (so cut it out, would you?) and there seems to be an inordinate amount of them. These people are where my view of Catholicism and gay marriage became skewed.