A guy and a Guy can adopt, and raise a child, and object or a dog can't adopt a child.
Doesn't make them able to procreate... and imagine a child in a family with TWO DADS. I personally would like to have a dog and a dad rather than TWO DADS. (lots of single parents with pets). Weakened families are the worse thing that can happen to society.
becuase two gays over the age 18 can marry, but can't if thier younger. it's the same thing.
Now you won't be sexist, but you will be ageist. Discriminating one group but not discriminating another... hmm.
Becuase birth control isn't 100%, and there is a HUGE difference moraly for siblings marrying.
True, but there's always abortion. And can you give me the reason why it is so morally different for siblings to marry versus gay marriage? Is it something related to... RELIGION?
You say it is morally different, but where do our morals come from? They originate from religion (not sure but you can prove me wrong) And if you say that, it is also morally wrong for gays to marry because religion, which is where our morals come from, says it is wrong.
How does being gay relate to incest?
It does relate because they both cannot marry. But if you allow gays to marry, why do you still discriminate the marriage of siblings, pets and objects?
There are a few logical reasons why gays shouldn't marry:
1) Religions, which is where our morals originate, are against it.
2) It totally weakens/cripples the definition of marriage. (A couple of friends marrying just so they can get the tax benefits)
3) Opens the road for more kinds of marriages. Unless we have a firm definition of marriage, the options for marriage are endless.