I believe that is actually a theory, seeing as how humans are not the only homosexuals in the animal kingdom. There was some kind of study, feeling way to out of it to look for anything, but it had to do with ants and that if they were doing well the percentage of homosexuality would rise. This isn't the best case however, seeing as how the queen ant is usually the one having the children. I just thought it was interesting and/or useful to this thread and/or to tired to care.