In response to:
Nick: I have no problems with incest, or polygamy, or any other relationship as long as everyone involved is a consenting adult.
Tired: Animals cannot give informed consent, that makes any sexual contact with one rape by definition.
President Obama is a thorough-going man of the left obsessed with power and thus in re-election, so his decision Wednesday to declare for same sex marriage is hardly a surprise. The only surprise is that his timing was so nakedly political and reflexive. The president was pushed into declaring his support by his Vice President and his Secretary of Education, and no serious person disputes this.
Of course...
How do you know that "animals cannot give informed consent?"
If your supposition were true, then many rabid liberals should be denied the opportunity to marry!