First, just because somebody is born a certain way doesn't automatically mean they are entitled to certain things. I don't know where you get that idea. Second, if we go by exactly what you said above, people who are born with attraction to kids should be allowed that act on that "right" as well.
First, it does. Second, the extend of their entitlements goes as far as not harming others. So how does gay marriage harm you?
"Fire cannot kill a dragon." -Daenerys Targaryen, Game of Thrones
