First off, the only people that will see pedophilia as 'more natural' if gay marriage is allowed are stupid people- homosexuality and pedophilia have absolutely nothing in common except that many people choose to categorize them as 'not normal.' Pedophilia is illegal, and should be. But like I said, there's no 'slippery slope' when it comes to recognizing a person's rights and then recognizing the right of an adult to sexually abuse a minor. Drawing parallels like this is senseless even more so because pedophilia is manifest in both hetero and homosexuality, as is, for another example, rape.
Secondly, the entire argument of whether homosexuality is 'natural' or not is a very, very shaky platform. Is there one codified way that every human should follow? Yes, only sex between a man and a woman may produce a child; one may safely assume that this is 'natural.' But, as I said earlier, homosexuality has been around for as long as heterosexuality has been around, so what determines what is 'natural' and what is not? Do we really have any right to determine what's natural and what's not?
Furthermore, even is something IS unnatural, is it just to ban said thing in a state constitution? This debate will still be going on a hundred years from now, because homosexuals won't simply disappear at the blink of an eye or the casting of a ballot. That said, are the rights of homosexuals something we're simply going to ignore until they go away?
Shit though, I'm tired of playing the defensive. If I may, I'll take the offensive for a minute. Realistically, what effect do you think that allowing gay marriage (or even just not banning it) will have on the American perception of sexuality and marriage? If two women are married somewhere in California, does that somehow invalidate your own heterosexual marriage? Are you and people you know really more likely to accept problems like pedophilia, only because gay marriage is legal?
It appears that the basis of our conflicting beliefs is in whether or not allowing homosexual marriage is a slippery slope that will lead to mainstream acceptance of other less acceptable acts. But that's not really true at all, because what you're really arguing is that mainstream acceptance of HOMOSEXUALITY is what will lead us to that slippery slope. Marriage or no marriage, the root of your argument is that allowing two men or two women to do 'that' will make it okay for people to fuck babies. Think about it.
Wayne: 'I don't own a gun, let alone many guns that would necessitate the use of a rack. What am I going to do... with a gun rack?'