The marriage issue
Arguments for gay marriage like this will go away after we pass the egg & sperm law, because a person will only be allowed to procreate with a person of the other sex. And there is law upon law affirming that marriage grants a right to procreate. The way to prevent people from procreating together, such as a brother and sister or mother and son or with someone married to someone else, is to deny them a marriage license. The obviousness of this perhaps blinds people to its significance. We need to prevent people from procreating with a person of their own sex as surely as we need to prevent brother and sister from procreating.