Perhaps both men and women captured and made to perform sexually in front of the victors as a show. The show is notorious for it's interesting aspects. It requires "handlers" (brothel owners) to keep the merchandise in line... usually by whip. The handlers force the merchandise to do all sorts of delicious but usually light play (double and triple penetration scenes, goring male slaves with whip handles, etc) for the audience. The audience members are, of course, the victors mentioned above. They watch and pick which (m, f, or any combination) will be theirs for a small sum of $$... perhaps whispering into the ear of one of their hosts? Perhaps they even bid on the slaves? The reason for the typically light stage play is because the customers tend to be very rough and imaginative.