"You like being in pain, don't you?"
"Yes ma'am."
She took the edge of a piece of paper and sliced on his dick before quickly pulling away and giving a single stroke with her finger.
"You want more, don't you?"
"So much more, ma'am."
She added another tiny slice before putting pressure on his dick, squeezing a single drop of blood out.
He smiled. "This reminds me of math class in high school."
