That "daddy" stuff is a huge turn-off sexually for anyone who has been a victim of incest. Take it from me.
And I don't know if the Emperor would be derogatory to his lover at all. He'd be in a position of authority as in taking everything in hand (no pun
) and being the one to instigate positions and all that, but I don't think he'd have so little class as to call the lover a "dirty whore" or anything like that. On the other hand, he IS the Emperor, so if he wants to degrade a lover, I guess that's what he intends to do and feels entitled to.
Hmmm, maybe he'd not say it outright but by his arrogant snobbish and belittling actions and what he does say, he'd certainly make her feel she wasn't much in his eyes. How's that for compromise?