Since ancient times, there has been no shortage of men who resembled women, and women who resembled men.
For some, it was indeed due to congenital genetics, unable to discern their own gender, leading to great suffering, but for too many, it was a pursuit of the peculiar.
When a person reaches the pinnacle of his cognition, he starts to feel emptiness and loneliness, hence always looking for newer, more extraordinary things to fill the void.
The tales of "cut sleeve" and "the passion of the cut sleeve" have been passed down from antiquity.
Most of the people seem to understand the merchant's peculiar preferences after Shi Tuo's obscure comments, knowing that despite having two men by his side, every night was filled with music and revelry.
Perhaps the Black Mountain Demon was a serious monster. In its eyes, what difference was there from taking a woman?!