If two people love each other, there shouldn't be any reason they aren't allowed to marry.
If you have a problem with it, you could learn to ignore it. Or better yet, get a broader perspective on life.
If its religious reasons that you state then I must say they are
total crap. Reasons like "God said blah blah" isn't a valid reason imo. Did he say same sex marriages are not allowed?
And then again we know this forum's views on God so lets leave that point aside.
If you mean social reasons like smurfi said, that needs a bit more of thought. But imo in his example marriage isn't the problem, adoption is. Then that's one for the adoption agencies to look out for. Why not allow them to marry? Having a family on the other hand can be a bit more complicated
It (having same sexed parents) doesn't necessarily mean that it would have a bad influence on the kids or the parents might not be good or anything. But it
could be that way. We have a million cases in our society where the case is the same. Its not always bad but it could be. What do we do there?
My answer is a "yes, it should be allowed"