The gay marriage issue is probably best solved by states rights. It would not be right to impose a single standard upon the whole nation by a Constitutional Amendment. Of course it goes both ways too ~ states can prosecute homosexual acts as sodomy if they want; just as other states have the right to allow gay marriages.
Although, a case can be made that pressure by the gay community to make their condition “normal” has deprived psychologists of a valuable tool that could have reduced the incidence of child molestation, adultery, and even offenses on minors by priests. As far as that goes, the ultimate objective of the gay revolution will be laws passed that allow the government to invade – and prosecute violations – in the bedroom. Too bad the X-files weren’t around back then.