Lucky guess.

"Um, whore?" she guesses desperately.

"Right! Good guess! Of course, you're not really a whore are you? Whores get paid. You'll give me what I want for free, any time I demand it. What you are is a ****."

Cassie stared angrily at me. "Fuck you!" she snarled.

"Yes, you will. Frequently. See, you're already beginning to understand."

Cassie clamped her mouth shut, blushing furiously. I walked behind her, still holding the pen. She turned her head left and right, trying to see what I was doing. I knelt down and wrote the word "DYKE" on her left butt cheek. "Well, what does that say?" I asked?