“If you get a question wrong, you will be whipped. If you get a question right, you will be whipped.  Anyone who gets a 4.0 in class this semester will get to fuck me. Anyone who fails will become my sex-slave next semester. Is that understood?” she asked.

“Yes, ma'am,” the class responded.

“What was that?”

“Yes… Ye- Yes, Mistress!”

“Much better. Now, you, the brown-haired girl in the back, get up here and eat me out while I lecture.”