With the recent US Court Ruling that openly gay men and women are allowed to serve in the US Armed Forces I got to thinking, did the Roman Army (Republic, Principate or Dominate) descriminate against enlisting based on grounds of sexual orientation? I know slaves, freedmen, women and eunuchs (and before Trajan men with only one testicle) were barred from service but were gay men? Does anyone know? Personally I wouldn't be surprised if it homosexuality was perfectly legal in the Roman army, considering how common it was in the upper echelons of Roman and Greek society.

Thanks in advance!