I recently argued that polygamy should be declared constitutional as it happens among consenting adults and nobody gets hurt.
Today I present to you my support for cousin marriage. The argument that I am using the "slippery slope" anti-gay-marriage crumbles when we considering that
1) I am against sibling marriage because it would have high likelihood to produce mentally and physically disabled children (therefore it would be cruel and it would result in great burden on our health system),
2) I support same-sex marriage
3) I am against the right to incur in bestiality as animals cannot consent.
My argument as a liberal is bolstered by the fact that most states where cousin marriage is legal are blue (Democratic).
Please use comments to discuss any argument prohibiting a ban on cousin marriage, if you have any.