I know this is an odd place to chime in here but I like the DNA argument. To further state- a mixup in the DNA would cause confusion in SUBSEQUENT generations. Whose lineage are you in? Tangent to that is the idea of God making rules for our benefit as a contrast to what the world does. There is no rule that I know of in secular society that might parallel what God has mandated. So God's rules stand in contrast to the lack of rules in society. I am libertarian in many respects but unrestrained freedom in every forum can be detrimental.