LOL!!! You are so silly!!! So, you are in favor of one man being able to marry multiple women? And multiple women being allowed to marry multiple men? And what about the rights of people who have sex with farm animals? They are being denied the "right" to marry their sheep. If you are against them having these "rights" who are you to judge?
You are simply a firm believer in spreading and promoting sexual deviancy.
I am actually in favor of the proposition that consenting adults, in whatever combination or number, be allowed to enter into whatever contract they desire (except for contract that would be otherwise illegal on other grounds, such as slavery contracts). The best solution would be for the state to simply get out of the marriage game.