When my slaves have been extra naughty I wrap their faces in saran wrap before ravaging their tits. & I really love pouring red hot candle wax all over my slaves tormented tits. whip right on nodes is wonderful for inflicting severe punishment. & so are small electric shocks. I also like to take common nail (not fingernail -- nail like you'd use hammer with) & scratch it lightly across surface of submissive's bob & her areolae. Not enough to draw pain-- just enough to hurt. & then lets not forget biting. HARD!