I was kind of surprised by El Cid's opening. Since the Lord of War (I can't say that without picturing Arms Dealer Nicholas Cage) lived her entire life posing as a man and being the epitomy of honor, the casual kinkieness was surprising. Sure, everything Tamamo says is in someway suggestive or poking the fourth wall, but she was a courtesan and an aspect of a goddess, so there is some sense to it. 
Even if she can on one hand say she wants to be the perfect wife and will castrate a cheating Master, yet at the same time lock herself in the Nurse's office for seven hours with either Rin Tohsaka or a shy Egyptian homunculus while Sakura watches through a keyhole. (Accursed American import cutting out the good bits).