Gyrate
101
In fact, allowing SSM will have a huge financial benefit (or rather prevent a huge financial disbenefit) for many same-sex couples and their children.
I strongly encourage you to read this article by the Avatar of Gayness himself Dan Savage: I Can Die Now
Think of Sartre, “Existence preceeds essence.”
snicker 
No, only some diseases.
And only in some states. (I even think there are some states that don’t test for any diseases.)
NY v. Md. See Guys and Dolls.
Nearly all states have gotten rid of their blood test requirements.