Marriage of course depends entirely upon the married, their culture and their interpretation. Especially in America where we have fused 100 cultures and traditions, there's little you can call universal truths about marriage.
Every single child has a mother and a father. If that's not a prime universal truth, I don't know what is.
Men and women have been found by psychologists in every culture and tradition to differ in aggression and general activity level, types of cognitive strength, and sensory sensitivity. The differences between man and woman are obvious to all but the most ideologically blinded deconstructionists.
Don't be silly. Sometimes its a sperm donor; often the father is not biological. Children are orphans; they are adopted; they are born to a surrogate. That's got to be about the silliest thing anybody has said on HN for a long time.
