Equal rights and civil rights are not endowed by any neoconservatives or liberals appointed court master, those are endowed by divine authority without discrimination. Persons have civil rights just like person. Are you suggesting logically consenting gays and consenting bi-sexual Americans should not have equal rights?
What about equal rights for three conseting adult Americans who want to be in a child-producing marriage? Obama puppet masters seem to be discriminating against some Americans unless someone can point out why they should not have equal rights.
You put me at a deficit when you quoted me. If you had included a few more sentences of my post, I clearly stated that there is no good reason to prohibit polygamist marriages between consenting adults. Regarding the "equal rights" legal argument, jumping from same sex marriage to polygamist marriage is making a jump from choosing to marry whomever you want, to choosing to marry whomever you want multiple times. There's a difference legally speaking, at least in my mind.
To illustrate this further, if a gay person says, "I am not capable of being attracted to someone of the opposite sex; I'm incapable of loving them in a romantic sense. Therefore if I choose to get married, I will be miserable and living a lie, because my choice is limited to people I could never love," that person has a legitimate gripe.
If same sex marriage is illegal, and a bisexual man falls in love with a man, and wants to marry him, then perhaps he has a gripe too.
But if same sex marriage is legal, then that bisexual man could marry a man, or a woman, whichever one they choose, and they are not being denied the right to marry whomever they choose.
Claiming a "civil right" to marry more than one person at the same time is a completely separate issue. A bisexual person who wishes to enjoy polygamy is no different than a straight person who wishes to enjoy polygamy, from a legal standpoint. So in my opinion, bringing up bisexuals' "civil rights" as a slippery slope argument against legalizing same sex marriage, it fails.
I think the fact that some people are asking the question indicates that some people think sexual enjoyment is the primary reason people get married.