I was just reading the marriage laws for Michigan, and found out that if you are an "idiot" or if you have "uncured gonorrhea or syphilis", technically you are not allowed to get married under Michigan law.
Obviously they don't follow these laws, but its pretty funny :) Try looking up laws in your state... its kinda fun :)
Well, in France you can marry a dead person. :) It is strange though because it isn't for financial reasons (you can't inherit money, pensions, etc) just for sentimental reasons. And you have to have already started the paperwork, their next of kin has to agree, the president has to sign off on it, etc.