You punish her for inadequate enthusiasm when tipping

Saying nothing, you pick the cane back up from where you'd put it, on top of the girl's neatly folded clothes. She starts to hyperventilate, unable to speak further, gasping desperately for breath that won't come. At the same time, a hush falls over the spectators, who'd begun to chat amongst themselves whilst watching you take your pleasure, but now return their full attention to the scene unfolding before them, conscious that the punishment is not over, after all.

You consider getting dressed once more, but in your present tumescent state it would be uncomfortable and awkward to say the least, so instead you just pull your clothes up while you position yourself above the miscreant's head, looking down her body, then relax, your member bobbing happily in the open.

"You do not decide how to tip a spanker; he decides," you admonish sternly. "Since this is the first day of tipping, I feel just one stroke should be sufficient to correct this aberrant behaviour. However," you tap the tip of the cane against the teenager's defenceless slit, "due to the added protection provided by your pubic hair, I will give you three."

There's a slight reaction from the crowd at that, possibly indicating a change in the way some young women are going to keep themselves neat and tidy down there from now on. In the meantime, it takes quite a while for the schoolgirl beneath you to recover her breath enough to beg you to cane her genitals, but not so long that you feel it necessary to add to her coming ordeal. Anyway, watching her chest rise and fall as she struggles to get air into her lungs is pleasantly stimulating.

When the end of the rod thwacks sickeningly into the line where her outer lips touch demurely, the brunette's legs instantly (and likely involuntarily) snap together, before immediately dropping back to their previous positions. With a wail, she counts the stroke, but seems resigned to the inevitable repeat. You order her to spread her labia for this and to your amusement, the spectators shuffle round to get a better view into her lewdly exhibited pink tunnel. Unfortunately, you don't have the same vista, but you'll console yourself with a closer inspection later.

Holding onto the bruised edges of her outer labia in order to pull them wide apart is intensely distressing for the virginal teen, but you hope that having her hands in the way will help prevent any repeat of the debacle with her legs. Whether or not this is the reason you can't be sure, but the next stroke upon her vulnerably exposed pudenda draws forth a scream that sounds barely human and makes the muscles of her thighs tense and spasm, but causes no unauthorized movement.

You bend down to inspect the damage so far and see the fuchsia nub of her clitoris peeking out from under the blackening bruise of its hood, her inner lips already starting to swell and stiffen from the **** of the blow. You smile contentedly and prepare to lay the final strokes upon the inside of her degradingly parted outer labia.

"Twooooo, thank-yyyoo-oou, s-s-sir. Puh-please cane me again."

The first, upon her right nether lip, sends a shock wave right through her entire body and her thanks are a long, slow moan of despair. The caning has left your dick even stiffer than before and you don't delay in applying the final, merciless crack.

"Aaah, three, thank-you, sir. Oh, oh, thank-you for punishing me for ingratitude and please may I tip you, sir?"

You put down the cane and hurry round to the other end of the luscious young lady, running your thumb delightedly over the excruciating raised weals you've just inflicted, which will make the coming tip even more dreadful than it would have been anyway. She's struggling not to start screaming again from your rough handling and you see the coral rim of her arsehole winking temptingly from her exertions.

"I hope you understand that giving up your virginity to tip a man isn't really your first time, young lady. It is completely different from your wedding day and not an excuse to copulate with the next boy who takes your fancy, just because you're no longer virgo intacta. I believe it's even possible to restore your hymen if your future husband requires it."

"Yes, sir, I'm sorry for what I said. I just hope it won't disappoint you…"