The Joker didn't do anything to Roman, you're confused with the movie Under the Red Hood. And Deathstroke didn't "verbally owned him".
You're free to think what you want, but for me Black Mask is one of Batman's best rogues.
There's literally ONE panel that can be considered sexual, and even in that one the "pose" is somewhat resonable for human anatomy.
LOL,Joker owned him worse than the movie in War Crimes.