Again, that post was addressing the incest restriction, not the number restriction. Interesting you keep conflating the two.... Freudian slip?<quoted text>
Did anyone ever use that argument against same sex marriage? No. Why? Because it is stupid. There are perfectly good laws against all the horrors you ignorantly and hatefully associate with polygamy. Prosecute the criminal, not his marriage.
You argue against marriage equality poorly. If I used your arguments against same sex marriage you would scream bloody murder and file hate crime charges.
I support marriage equality and you do not.
Again, the incest restriction is about child abuse.
There are other considerations including but not limited to procreation, but child abuse alone provides a compelling governmental interest sufficient for the restriction. Removing the incest restriction would facilitate training a child from birth, to be the eventual spouse of the sibling or parent.