The emphasized word is neither vague nor is it a reference to male prostitutes, as male prostitutes are a separate category. Paul here is giving examples. Male prostitutes and homosexuals are two separate examples. This is the only verse where the word "homosexual" is explicity used. But saying that in the original language it doesn't mean the same as today is unsupportable. The meaning is quite clear from the context both here and elsewhere sexual immorality is discussed. Although the word "homosexual" isn't used elsewhere, Paul here explicitly includes it in a list of sins of immorality. And there are plenty of references elsewhere to immorality. It's a consistent theme. Sexual immorality is a no-no. And homosexuality is one kind of sexual immorality.
And note that it's not just men. It's quite clear that same-sex sexual relations are considered by the Bible to be immoral. It's consistent with the context. So if you choose to bring the Bible into the discussion, it doesn't support gay marriage.
Good points. So, then, why should the laws of the United States, a firmly secular nation, be decided by a single passage in Paul's book of the Bible? The only defense given so far in this thread (or anywhere else I've ever seen for that matter) is that a lot of people think that being gay is immoral based on their religious beliefs.
But what nobody has explained is why banning gay marriage is any different than banning being gay, or why the religious beliefs of some should govern everyone in a country that is not based on a theocracy.
If one were to accept the arguments about why being gay is wrong, then it's any homosexual act that should be banned, not just marriage. What is happening currently is people are caught in this bizarre ideology where they know it is wrong to say nobody is allowed to be gay, but then saying since it's wrong to be gay you can't have the same rights as everyone else. If it were 50 years or so ago, the argument would be about the ban on "sodomy" or whatever else, a few decades later it would be about whether it was okay for gay people to be openly gay or whether they should stay quietly ashamed of themselves. You may call this a sign of the downfall of society, I call it a lessening of bigotry and progress towards the goals set forth by the founders of America that all men are created equal, with inalienable rights.
If anyone has a good reason why gay marriage is wrong that doesn't include an argument about why being gay is wrong, or why this country's laws should be based on some people's interpretation of their own religious moral code, maybe I'll finally understand where people are coming from. Otherwise, it just sounds like the same tired tirade full of misconceptions and stereotypes.