"Alright everyone, we're going to have a very special class today, and our friendly Hylian vai here is going to help me." Ashai rested her hand on Link's shoulder and squeezed him possessively with far more force than her students would be able to see.
If the voe had made one mistake... well, it was probably sneaking into Gerudo town in disguise as a vai. If he had made a second mistake, however, it was thinking that the woman who literally taught classes on voe wouldn't be able to recognize one. Sure, the disguise was good, and most Hylians were pretty hard to tell apart unless you really got them out of their clothes but she of all people he should have known better than to feel smarter than. He was definitely squirming slightly in her grip and under the eyes of her students. She didn't think he was going to try to run. He knew she had all the leverage. Run or disobey and get properly reported to the guards, put every Hylian under more scrutiny and be the one who ruined the whole black market of voe intruders that the town needed more than it let on. Better for him to play along and hope that she didn't intend to be the one who ruined things. She didn't. Fun didn't have to ruin things.
"Now, I understand that it can be hard to tell a Hylian voe from a vai when we see one," She felt him tense and she smiled a little, "Even my little friend here, she may look like a vai, but could you really be sure if you met her out in Hyrule? You could be letting the voe of your dreams slip right out from under your grasp."
"Ms. Ashai, does this mean we should approach every Hylian we see?" One of the students asked.
"Hmm? You're certainly allowed to, and there's no harm in pulling in the occasional vai. In fact, it happens quite often. While this isn't something helpful in the long term, there's no reason to simply throw them away. Remember, a vai in the hand is worth two voes in the bush."
"But Ms. Ashai, how do we... partner... with a vai?"
"Why, that's what this class is about, my most impatient of students." Ashai delivered it with a pause for the others in the class to titter at her expense, "After all, a Hylian vai could not handle partnering with one of us the way which we might partner with each other. Sure, many of them think they could, but it's not worth the risk of finding out the hard way that their eyes were bigger than their stomachs."
Ashai stepped behind her desk and pulled something out, she held it up for the class (and Link) to see. The girls made noises of mixed interest and embarrassment, Link made one of uneasy confusion.
"This, my students, is a strap." She ran her hand along it, "I made this one myself out of pieces of ore gifted to me by a Goron suitor. You may make yours out of seal tusk, polished stone, whatever strikes your fancy, just keep in mind that if you wouldn't put it inside yourself, you shouldn't try putting it in somebody else. Of course, if you do not wish to make one yourself, you can always purchase one from myself or one of the vendors in town who sells Hyrule exploration gear. Though they may not be as nice as the ones you end up making yourselves."
She set it on the table and let her words hang for a moment, letting Link look at it. She wasn't sure just how innocent he was, some of the older Gerudo talked about him and the princess like they'd merely been good friends, some talked like they had been lovers. Either way, she doubted that he'd ever been on the receiving end of something like this, even if his body looked all but built for it. He was more feminine, more appealingly proportioned, than just about any of the foreign voe she'd seen. But she'd also realized many years ago there was a good reason she wasn't ever going to be "Mrs. Ashai."
"Now, I would be willing to wager that most of your straps if not all of them will be smaller than this one, as an excessively large one is of benefit to nobody. However, even if you consider your strap to be quite small, this is another important component of things." She brought a jug of fruity-smelling oil from under her desk. "Like the strap, I make this myself, but you may get your own from wherever you please. I'm even willing to divulge my recipe for a price."
She uncorked the bottle and dunked the whole of the business end of the strap inside, then brought it out and pumped her hand up and down it a few times slowly. Link blushed under his veil and looked away.
"The first step is to properly and thoroughly lubricate the insertable portion. The comfort of the partner is everything, students. Unwelcome pain is the greatest foe of romance. Welcome pain... well..."
The class gave a lusty giggle, though it was more to do with her timing than anything. Ashai often got the impression that her students came in knowing nothing about the world, the other sex, or intimacy and walked out knowing nothing about the world and intimacy. This was a rare opportunity to teach a second subject.
"Now, with the insertable portion lubricated, you want to give the same treatment to where you intend to insert it."
Her hand found Link's shoulder again and hauled him over the side of her desk. She brought his pants down to uncover his ass and felt him freeze as he readied to be exposed to the class, but she kept the pants in place to hide his secret, only exposing the plump pale flesh of his ass. She spread it enough to expose the hole and drizzled a massive drop onto her target. She lubed her own finger next and then pushed it inside of him, feeling him freeze and tighten in an entirely different way. He was so warm and so tight on the inside, she couldn't help but wish she had the genuine article. Whoever got to pop his cherry for real was in for a treat, but she could at least take a first place victory by technicality.
"Now, you may question why I'm going to be using our vai's ass for demonstration. I would advise you generally to avoid this, however this is a unique case. As this vai is particularly more adept with this hole than her other, and with a strap of my size she's going to need all the help she can get." Ashai paused to let the class let out a mixed snicker and hiss, "As well, some vai even quite like it in the ass. Some voes as well, though I would discourage wasting their more reproductively useful fluids. I know for a fact that this one is going to quite enjoy being part of our little demonstration."
She slapped Link's ass gently with her free hand while she worked two and then three fingers inside of him, feeling his hole slowly relax and accept it. She wasn't treating him rough, aside from a few spanks here and there, so he was finding the adjustment easier than he might have otherwise. He was hardly the first voe she'd done this to, and they all learned to accept it. Some even came back for repeat showings. Ashai grabbed the strap and slipped it on.