Pull at his balls in an unpleasant way.

From Create Your Own Story

You jump back, spiting out his cum in disgust.

"What? Why did you stop?" He asks, annoyed.

You glare at him. He's a jerk, always playing with girls like that. Before you can even comprehend what you're doing, you've grabbed his balls and squeezed them tight together so they've actually turned purple. He looks at you scrunching his eyebrows in pain, before you painfully stretch out his dick and let it snap back.

"Oww!" He yelps.

There are no other seats on the bus, but you don't care. You wouldn't sit next to him if your life depended on it. You walk up to the front and stand, not listening to the commotion behind you that would be his girlfriend screaming at him while everyone else stays silent and watches.