So then the right to specific health care for what's in one's underwear should be denied based on that reasoning?<quoted text>
Our rights should not depend on what's in our underwear.
I take it you are unable or unwilling to answer the questions.I'll take that to mean you can't come up with a rational argument against gay marriage.
If its the consensus of society that marriage is simply a union of two consenting adults, there's no need to prohibit any two person, consenting adult, union, including blood relatives. Why should it matter who marries who, or who can't marry who?