Someone else pointed out a few days ago on another thread that if the definition of marriage is thrown wide open, a wealthy individual could potentially “marry” his children and avoid estate taxes. The commenter also commented that if this became a common practice, the Democrats would start pushing to return marriage to the “one man, one woman” definition.
I'm sure democrats support incest. By the same logic they support 'gay marriage': somewhere there's a young man who remembers 'always' being turned on by his mother - from the time he was very young... he was 'born that way'... which is the only standard of truth dems acknowledge. We can call him Oedipus for short...
Anyhow what they would do is just raise taxes on the rich who might use such a tactic... and keep the incest.