Well, that's all well and good, but if a couple does not have a right to procreate, then that couple is also not allowed to marry, even in California:
285. Persons being within the degrees of consanguinity within which marriages are declared by law to be incestuous and void, who intermarry with each other, or who commit fornication or adultery with each other, are punishable by imprisonment in the state prison.Currently, same-sex couples have the right to attempt to procreate with SSP, but only because Congress hasn't got around to enacting the egg and sperm law yet. That law would mean that a same-sex couple, like siblings, would not have a right to procreate together, and therefore, like siblings, they would not have a right to marry each other. Because ALL MARRIAGES must have a right to procreate, regardless of the fact that it is possible and even legal to procreate without marriage.