Jerk off

"I dare you to masturbate!"

You pause, sure you had misheard.

"M-masturbate? In front of you?"

"Of course!" Tammy beamed. You blushed as you realised what Tammy was asking you to do. Not only did she want you to expose yourself, you had to jerk off for her!

"I...er...can't do that, Tammy. Do you think I could have another dare?"

"I'll give you a choice," she smiled wickedly. "Either wank for me, or burn your clothes!"

That really made you blush crimson. Being seen by one girl was bad enough; having to walk home naked would be mortifying!

Reluctantly, you stand up and wrapped one hand around your penis. Slowly pumping your hand back and forth, you quickly become fully erect.

You feel incredibly awkward, knowing that a fully-dressed girl is watching your every movement like a hawk.

Before long, you are close to climaxing. But just before you finish, Tammy pulls your hand away.

"That's enough!"

You let out a frustrated moan as the nerd keeps you from release.

"No! Tammy, please," you beg.

"Nope!"

Thinking quickly you say, "fine, I dare you to make me orgasm!"