The lead singer from Matchbox Twenty calls himself "a straight man, with a big gay chip on my shoulder" and says it better than most in this HuffPost column on Marriage Equality:
"A civil union has to do with death. It's essentially a document that gives you lower taxes and the right to let your faux spouse collect your insurance when you pass away. A marriage is about life. It's about a commitment. And this argument is about allowing people to have the right to make that commitment, even if it doesn't make sense to you. Anything else falls under the category of "separate but equal" and we know how that works out."
Here's another key excerpt:
"I believe the fact that an atheist, who doesn't believe in God at all, is allowed to enter into the holy land of marriage while a gay Christian is not, shows that this law is arbitrary. Are we to believe that anyone who doesn't live their life according to the King James Bible isn't protected by the same laws that protect those who do? Using the same argument that I've seen on the 700 Club, that would mean that Jewish, Hindu, or Muslim weddings are also null and void."