Make class interesting.

You don't care that I'm in your class today.

"Fine," said Professor Martell. "Take a seat and don't interrupt."

You take a seat.

Professor Martell goes on about BF Skinner.

Your pussy, anus, and nipples itch.

Professor Martell pauses. An annoyed look crosses her face, and she shifts from foot to foot a bit. She clenches her teeth for a second then continues.

The itching is getting worse.

Professor Martell pauses again. She clenches her fists and fights the urge to scratch.

The itching in your pussy and anus is getting deeper.

Professor Martell's breathing gets heavier. She is almost in a full-body clench as she is resisting every urge to scratch.

You're getting horny too.

Professor Martell leans back against her desk. She grips the edge of the desk, and her knuckles turn white.

You hear some whispering among the class.

Professor Martell closes her eyes and temporarily forgets her place. "Um, I... um... uh... where were we?"