She uses her hands.

Without hesitation Liza grasps your cock and strokes it.

"Well, that's interesting," says Mr. Barstow. "You didn't have any problem at all touching his penis."

"Yeah, you were right. It's so much bigger than Jake's, I really wanted to get my hands on it." Liza gets you harder than you've ever been in just a few seconds. The whole class watches as she holds the ruler to your fully erect cock. "It's ten inches, sir."

"Thank you, Miss Harden. I think you've done an admirable job of proving to the class that a girl can pick up the subconscious cues and tell that a jerk like Mr. Valden is just making up for a small penis, while someone more likable is much better equipped to satisfy her. Mr. Valden, you can return to your seat."

Jake pulls up his pants and slogs back to his chair. Almost everyone holds back giggles as he walks past them. He sits down with a thump and covers his head.

"Face front, Mr. Valden. You need to pay attention to the next part." Mr. Barstow points to Liza's hands, which have drifted back to your cock. "The young lady obviously has some unvoiced desires, probably backed up from the frustrations of dating such a small dicked loser for so long. We're now going to watch a better equipped young man help her with those pent up feelings."

Liza smiles at you like a kindergartener seeing Santa.