You make them wear ballet boots

You decide that the problem is their footwear. Lorelei is wearing tall red stilettos, but Johanna has much lower platforms and you think the picture they present would be much more pleasing if the shoes they wore were matching, all the more so if they caused their wearers some difficulty or discomfort.

"Are you familiar with ballet boots?" you ask, out of the blue.

"Er, yes, Professor," the Asian girl is the first to reply. "We've all seen the sorority pledges wearing them in Hell Week."

"I, uh, actually have a pair." The big-titted redhead produces the same endearing flush you saw before. "A gentleman who used to let me practise doing his housework bought a pair for me. I couldn't walk in them, nor even stand up, really, but he said that it's never wrong for a girl to get on her hands and knees and crawl, so that was alright."

A knock on the door tells you that the next pair of students is waiting, so you wrap up the tutorial as quickly as possible.

"I think it would be a good idea if you both wore ballet boots while you're on your nudity punishment. It will give you a constant awareness of your situation and draw even more attention to you."

"Yes, Professor," they chorus obediently. Johanna is perhaps slightly less successful at hiding the distress your instruction causes, but you have no doubt that they both accept your statement as truth.

You hang the placards around their necks, dangling just above their belly buttons. Lorelei experiments for a moment with having the chains either on the outside of her boobs or running down her cleavage, but in the end opts to have them rest over the fullest part of her breasts, touching her stiff nipples and causing the placard to be suspended a couple of inches in front of her abdomen. Her tute-partner has no such difficulties and simply lets the pernicious object hang against her skin.

The two press you to accept substantial payments for your spanking services, effusive in their gratitude for the efforts you've expended on their behalf. As you've run out of time for the day, you decide to defer the extra twenty smacks you owe Lorelei until she comes to collect her clothes. Finally, everything's sorted out and you enjoy the sight of two well-chastened young ladies, their bare skin glistening from the sunscreen, tears drying on their faces and weals colouring beautifully on their bottoms and thighs. Your job is truly fulfilling, you reflect.

"What are your plans for this evening?" you ask, as the girls gather their things and limp painfully towards the exit.

"I have a date." Again, Johanna is the first to answer.

"Off-campus?"

"Yes, Professor," she replies with a blush, no doubt imagining the inevitable humiliation, not to mention the likelihood of incurring further punishment whilst in the city.

"And what about you, Lorelei?"

"I was planning to practise my interpersonal skills at a pub in town."

When she walks (or crawls, if she hasn't mastered the boots by then) into a crowded pub tonight, you don't suppose the skills she will be called upon to practise will be conversation and active listening, but you're confident the experience will be educational nonetheless.

"That's an excellent idea, Lorelei," you say with a smile, which she forces herself to return, although she might have been hoping you would order her to stay home and study instead.

You open the door and the young women waiting outside fall silent at their first sight of a nudity punishment in progress. Thanks to the power of the Rulebook, you know that the hourglass blonde in a sorority cardigan is Catherine, whilst the tall black girl wearing a college cheerleading outfit is Victoria.

"Well, I'll see you in three days at my house to collect your clothes."

The naked teens say goodbye, then take a deep breath and, clasping hands for mutual comfort, set out into the wide world. You're pleased they both seem to have recovered reasonably well from the heavy spankings you administered, although they're both showing the signs of considerable pain and Lorelei is having to walk very gingerly to avoid irritating her stinging crotch even more.

Needing to update the electronic record before the next tutorial, you tell the waiting girls you'll just be a moment and then push the door to, but not shut, as a result of which you hear their following remarks in between peals of laughter, which you're sure also reach the ears of the pair who've just left.

"Oh, em, gee, did Lorelei steal Jo's tits without her noticing or somethin'?"

"The way Jo was staring at her rack, I think she wants 'em back!"

"Rather her than me. Lorelei's'll be down round 'er knees by the time she's thirty."

You're not sure how you feel about this. On the one hand, half the point of a nudity punishment is the embarrassment and mockery, but on the other, young women should be polite at all times and there must be more than enough men and older women capable of providing the required level of derision.