here is a thought.... since Eunuchs had no seed, they could not commit adultry, and were often allowed to have as much sex with the harem girls they guarded as they liked... sounds like a good deal... they also could not commit adultry in their heart (^_^)
btw, Adultry means to mix alien or illegal seed in the field of another.... most feared among ancient males, to raise the child of another pretending to be his own...because of his mates unfaithfulness.