Ever since the days of Fredric Wertham, people have been pointing out the homoerotic elements in Batman. There are hundreds of GIFs of Batman in his pink costume, or that famous scene where all the other DC heroes worry about their girlfriends, and Batman worries about Robin. There's even a Wikipedia entry on "Homosexuality in the Batman Franchise," complete with an image from a 1954 comic showing Bruce Wayne and Dick Grayson apparently sleeping in the same bed.
Top image: Frank Quitely/Playboy.
So when Batman, Inc. writer Grant Morrison said in a Playboy Magazine interview that he thought the concept of Batman (not Batman himself) was gay, the fan reaction was muted. Here's what Morrison says:
He's very plutonian in the sense that he's wealthy and also in the sense that he's sexually deviant. Gayness is built into Batman. I'm not using gay in the pejorative sense, but Batman is very, very gay. There's just no denying it. Obviously as a fictional character he's intended to be heterosexual, but the basis of the whole concept is utterly gay. I think that's why people like it. All these women fancy him and they all wear fetish clothes and jump around rooftops to get to him. He doesn't care-he's more interested in hanging out with the old guy and the kid.
He also points out that Wonder Woman was only really popular when she was having lots of bondage and strange lesbian stag-hunts.
In any case, I've seen articles claiming that Morrison's comments caused a huge internet hub-bub... but I haven't quite been able to locate the hub-bub yet. There have been a few grouchy comments here and there, and a number of people pointing out that Batman is currently boinking Catwoman thus proving that indeed, "as a fictional character he's intended to be heterosexual." And a few other people have wondered what, exactly, the "pejorative sense" of gay is. The main critical comment I've come across thus far? Over at the Bleeding Cool forums, Phantom309 asks, "Why is Captain Picard about to crush all those characters?"