Latex Sex-Ed #3 (Pixiv Fanbox)

Kaori pulled back from the kiss and with a malicious grin pulled a gimp hood over Felicity's head. Felicity, knowing her role, knelt on the floor as her classmate deftly linked her wrists to her thighs, binding her in position. "Now class, since Felicity here is new to the Sex Brigade she is in the lowest tier of sex slaves and thus is not allowed use of her eyes or mouth yet. She will be used vaginally and anally until she has been deemed worthy of pleasuring others with her mouth but until then she will be wearing this hood which only has holes for her to breathe through her nose." She knelt down next to her and quickly removed her latex schoolgirl outfit next. "She is also not worthy of clothes, but I will allow her to keep her socks and shoes on...because I am a kind Mistress." Kaori said as she smirked at her kneeling protege.

"Now class, in the Sex Brigade we pride ourselves in being able to provide the maximum pleasure possible and that would not be possible without the tightest of pussies. We have sex with many various males, not just humans. We get experience with horses, dogs, gorillas, demons, and zombies and normally that would stretch out our vaginal canals horribly. However, we undergo rigorous exercises to keep ourselves nice and tight down there. For example, Felicity here just last week had sex for the first time with a unicorn who had a cock the width of a soda can. But now look." Kaori grabbed a pencil from the teacher's desk and gently stuck the eraser tip deep inside the slave's pussy.

It stayed put.

Kaori smiled trimuphantly. "Through rigorous daily Kegel exercises, Sex Brigade members all have resting vaginal canal diameters of 1.5 cm or less, and its vaginal wall muscle contraction strength is an impressive 30 kg. For comparison, average maximum male hand grip strength at age 20: 35-55 kg. And she can hold it here for over thirty minutes too!" Kaori pulled a riding crop from her backpack as she empathized the time length. "And if she doesn't...we have our own ways of encouraging them..."

With that, Kaori gently drew the crop across the slave's nostril holes, letting her sniff the rough leather that could soon be drawn against her....