For those who are sceptical about Gay rights intentions, this statement from the The 1972 Gay Rights Platform makes it crystal clear.
Under the (American) State Level, No. 8 demand reads: "Repeal all legislative provisions that restrict the sex or number of persons entering into a marriage unit; and the extension of legal benefits to all persons who cohabit regardless of sex or numbers."
So there is proof, if one ever needed it, that the intention of the homosexual "marriage" lobbyists has nothing to do with ordinary, traditional, marriage as we know it, but everything to do with overturning this valued cultural institution.
No. 7 demand, incidentally, is just as scary : "Repeal all laws governing the age of sexual consent".
Is that black and white enough for you?