I have been asking for a gay sub forum since I got here and saw so many gay threads posted every day. I don't think it would work because people like howey, seawytch and bodey are not happy unless they can shove their gayness in everyone's face every day all day.
...As opposed to you throwing their straightness in everyone else's with a buncha naked ladies.
The difference being they wouldn't be doing it in the gay forum. I guarantee even if they had one they would still keep posting in the straight section.