Why are gay marriage proponents against marriage between Father/Adult Son, Mother/Adult Daughter, Male Adult Siblings,Female Adult Siblings?

Honey, really. You can't do better than this?

I'm personally not. It's not an arrangement I would enter in to, but I don't concern myself with the private arrangements of other peoples' lives.

I would suspect there are just so few people in those sort of relationships that there isn't much of a movement to legalize it.

Incest is incest. It wouldn't matter wether if it was two gay brothers dating, it's still not okay. You have the same genes, it's not right. Marriage is a government institution, you are already a family legally, you have the same blood, you are related, you cannot marry a blood related family member it is against the law. Gay marriage is not against the law, it was ruled unconstitutional. There is no law stating gays cannot marry, there is a law that incest is not alloud.

you guys continue to drag out pseudo arguments against gay marriage. face it homophobe. gay marriage is hear to stay. and it has absolutely nothing to do with the situations you brought up. in fact if I remember correctly, some of your Christian leaders were going to set themselves on fire if the supreme court acted as we all knew they would. haven't even seen a hint of smoke yet.

If it's love and commitment, it should be legal between concenting adults.

They already have a family relationship.

cause you all have the same genes