*BBBBZZZTTTT** WRONG WRONG WRONG! Homosexuals cannot have progeny!!! Therefore progeny is not an issue for marriage!!!! Therefore there are NO GENETIC Issues!!!
Or is Marriage about having sexual relations? So the foundation of our society is about legalized sex?
You cannot win this one.
Alas, you're quite wrong on that. I know gay people who are having children, both by adoption and surrogate parenthood. We are said to be in a "gayby boom". This is a frightening social experiment our country has embarked on. We already see the terrible results of single parenthood.
You make an interesting point. I am acquainted with a couple who have been married for several years. They are sick of hearing questions from their friends and family about when they're going to have children and recently made a formal announcement that they are NEVER going to have kids because they don't believe they can live up to that responsibility. Well, why did they get married, then?
For that reason alone this exclusion to marriage should reside side by side to incest.