Human Sexuality Class Week 8 - Kinks, Fetishes, and BDSM [Multiple M20's/Multiple F20's] [Very Public Sex] [Anal] [Spanking] [Sister-In-Law]

Links to the previous weeks' stories [here](https://www.reddit.com/user/sneberd/comments/1k9tquh/my_stories/).

# Week Eight - Kinks/Fetishes/BDSM

When we got to class for week eight, the beds and chairs had been removed from the classroom, and on the board Kate had written “Everyone stay clothed for tonight’s class except Craig and Becky.” I was intrigued; Kate had mentioned previously that we would discuss fetishes in week eight, but hadn’t said anything more about it. I felt that a discussion of fetishes was bound to be better if everyone was naked, so I wasn’t sure why the class was directed to stay clothed.

After Becky and I undressed and the rest of the class was there Kate walked in, also opting to stay dressed. “Tonight,” she began, “we will spend the first half of class discussing various kinks and fetishes, and then the second half will be a field trip. Craig and Becky don’t need to be naked for this part, but I know they enjoy it,” it’s true, my penis was again hard, “as do we, so I instructed them to. Now, someone besides these two, can you tell me something that turns you on that might not turn most people on, whether you’ve done it or not.”

The class members thought about it for a few moments, then one of the girls mentioned that the idea of being tied up and dominated turned her on. “Mmmhmmm”, I heard Becky say next to me in agreement. I looked over at her curiously, I had never pictured her that way.

“Perfect,” Kate said, “let’s spend a minute talking about BDSM. BDSM stands for ‘bondage and discipline, dominance and submission, sadism and masochism’, and this can mean many different things for different people – it’s a very broad topic so let’s break it down. Ashley mentioned being tied up - bondage - and being dominated. Often bondage and discipline go hand-in-hand with dominance and submission, and often with sadism and masochism, although the last two deal specifically with pain, and pain doesn’t always have to be a part of it. Many women, and men too, get turned on by being dominated. Many men, and some women, get turned on by dominating. There are many clubs, web sites, and services that pair up these two types of people for an erotic, fully consensual experience. Sometimes the fetish is with discipline and the idea of full control (often without the need of physical restraints). This can include orgasm control, which is a skill that very few have truly mastered.”

“The most important part of this is full consent - situations should never get to a point where either party is not comfortable being. It’s important to have safe words or signals that both parties feel comfortable using, and both parties are willing and able to stop if their partners use. While non-consensual dominance is certainly a fantasy, it is not one that we will discuss in this class.”

Kate continued, “This consent is especially true in sadomasochist situations, which are in short, characterized by contrasting experiences of pleasure and pain. Sadism is getting sexual pleasure from inflicting pain and humiliation on someone else, and masochism is getting sexual pleasure from experiencing pain and humiliation. We will have a short demonstration later during our field trip, but again I must iterate that the depth and levels of this kind of experience must be agreed by you and your partner.” I wondered what kind of field trip Kate had set up for us, certainly one unlike any I had ever been on. I could hear Becky breathing heavily next to me, and couldn’t help but notice how hard her nipples had gotten as we had been talking about this subject. Kate discussed a few more details about BDSM and answered some questions from the class.

“There are numerous other kinks that are sometimes related to BDSM, but don’t have to be, including kinks surrounding other bodily fluids like pee and poop; kinks involving other people like exhibitionism and voyeurism; clothing kinks like costumes or sexy lingerie; kinks involving toys like vibrators, clamps, rings, or collars; role playing; etc.. The list is practically endless and it seems like people are coming out with new kinks every day, some much more perverted than the ones we have mentioned. Does anyone have any comments or questions about this, or would anyone like to share any specific kinks that they have?”

Edging, masturbation instructions, and auto-erotic asphyxiation were all mentioned by the class and discussed, with another dire warning about safety from Kate. “Please be careful, and make sure to always use sex in the bounds of safety and security. Oxygen control can quickly go from a pleasurable experience to a life ending one.”

“It’s time for our field trip, but first a little explanation. Craig and Becky have been such good subjects for us this year that I thought we would allow them to both fulfill some of their fantasies, which is all I’m going to say at this point. Craig, I’m going to blindfold you but you will otherwise stay naked for our trip. Becky, you may don a robe while we travel if you want, but you don’t have to. We will be walking, but not far.” Becky, still horny from the earlier discussion, opted to stay naked, and Kate wrapped a blindfold around my eyes, shutting out the visible world.

It was a very surreal experience. Becky took me by the hand, and knowing that she was walking next to me, naked, made the experience that much more enriching. Together the class left the classroom, walked down two flights of stairs (we were too many for the elevator), and walked out into the crisp night air. Kate knew that exhibitionism was one of my fantasies, and this must have been what she had in mind; as we walked I could hear people talking, some gasps, and I may have been imagining things but it felt like our group was getting bigger. I was so incredibly horny that my penis had not softened in many minutes; Becky was my lifeline and I loved having her by my side.

We walked outside for a few minutes, and then entered a different building on campus. We went through a doorway and up a couple of stairs, onto what felt like a wooden surface, where Kate instructed me to stand. Becky let go of my hand, and I felt very alone all of a sudden, although I could hear what sounded like many muffled voices. I jumped when I felt someone by my side, but calmed when I heard Kate’s voice. “Craig, in a minute I’m going to remove your blindfold, but first you will hear my voice much louder, don’t be alarmed.” I heard the sounds of curtains opening and realized that I must be on a stage of some sort, then the muffled voices became un-muffled and I could tell there was a bright light shining on me. I initially felt the desire to cover my hard cock, but knew that this was indeed my fantasy coming true, and kept my hands by my side.

“Ladies and gentlemen, thank you for coming tonight to our performance,” Kate’s voice came out over a loudspeaker, followed by a boisterous round of applause. “This is the performance part of our Human Anatomy and Sexuality Class, and boy we have a show for you tonight. Let me introduce Craig Sneberd.” She took off my blindfold and I saw our audience; it was a mid-sized auditorium, and there were about 100 people sitting in the chairs, with the rest of the class on the front row cheering loudly. The audience applauded as I stood nude before them. Kate continued, “Tonight we learned in class about kinks and fantasies, and while Craig hasn’t told me directly his fantasies, I have a feeling that exhibitionism and public sex are high on his list, so tonight we are going to make those happen for him. An erotic chill went down my spine.

Our other guest of honor is Becky Johnston.” Kate indicated to her right, and I looked beside her and gasped. A four-post bed had been set up, and Becky was naked on the bed lying on her stomach, and was tied to the posts with her ass up in the air. Next to her appeared to be some toys, a paddle, some lube, and some other things. She had what looked like a ball gag in her mouth, and a look of excitement in her eyes. “Becky had expressed earlier in private to me that one of her kinks was being tied up and spanked, used in front of many people, so that’s what we have set up tonight. I have talked to her previously about this experience, and she has consented fully to it, with the stipulation that only Craig has full access to her. Craig, you may now pleasure Becky in any way that you see fit. The audience and I will watch quietly, but not interfere.”

I couldn’t believe this was happening. I couldn’t in my wildest imagination have anticipated it, and I was loving every second. My penis led the way over to the bed, and I climbed on top of it, wrapping my arms around Becky in an embrace. “Are you sure you’re OK with this?” I whispered to her? She nodded enthusiastically and moaned in affirmation. “If it gets too much, shake your head no and I will stop immediately,” I told her. I was startled then to find that the bed was moving. Not only back and forth from our motion, but it was turning in a circle, ever so slowly. It had been installed on a rotating platform, so that no part of this would go unobserved by our audience. This was going to be fun.

I guided her butt up into the air and started with my mouth on her pussy, which was so incredibly wet! Her aroma was like a pheromone and excited me even more if possible. As I was eating her out, I took my hand and spanked her right ass cheek, not very hard but enough to make a clap. She moaned in delight so I spanked her harder, and then her left cheek. I pulled my head back and took the paddle that had been set beside her, and used it to smack her ass, right in the middle, then again and again. Each smack was a little bit harder, and left her ass slightly red. After several smacks, I again resumed eating her out, this time alternating between her pussy and her asshole. I reached around her and pinched her nipples as I did so, and by this time she was moaning and writhing in pleasure. As I tongued her asshole she had her first orgasm, and screamed through the ball gag. As I was grasping her tits, I mounted her from behind and inserted my very hard and aching cock into her dripping wet pussy. It felt incredible, so incredible that I had to go very slowly to keep from cumming. I wanted to cum so bad, but wanted to make this last a little bit longer. She was so ready though that she came again as I was riding her doggy-style from behind, alternating between smacking her ass and pinching her nipples while I did.

After her second orgasm, she indicated that she wanted me to pull the gag out of her mouth, so I did, afraid that maybe I had gone too far or had hurt her, but I was wrong. “Fuck my ass”, she said breathlessly, “and cum in it.” I didn’t need to be told twice, but I did have enough brain power to put some lube on my cock first. I slid in easily though, and the feeling of her tight ass hole was amazing on my ready cock. She reached for a small vibrator that was next to her and used it to massage her clit while I fucked her asshole.

Neither of us lasted long after that; I had tried so hard to control my orgasm but I couldn’t any more, so with a loud moan I came deep inside her rectum, in a mind-blowing orgasm that left me unable to move. Luckily she came then also, her third time that evening, and we collapsed together on the bed, intertwined in the post orgasmic bliss.

The curtains closed to thunderous applause from the audience, and Kate was beside us, untying Becky’s ties. “I have been doing this class for years,” Kate said breathlessly, “and I have never had two subjects with the chemistry that you guys have. We have put on different shows in the past, depending on certain students’ kinks, but I have never witnessed a show of that magnitude, it was truly fantastic.” Her voice went down to a whisper, “I was so hot I rubbed one out myself while I was watching you guys.” To me this was the best compliment she could have given us, that we turned on the teacher.

Our clothes had been brought down to us and we were given time alone to get dressed after Kate, the rest of the class, and the audience had left. I looked over at Becky, making sure she was OK. She still looked flushed but had a glow about her and a smile on her face. She looked back at me and winked, saying “That was fucking amazing, but I’m not sure about sitting down any time soon. I may need some cream rubbed on my ass later.” That broke the spell and we both started laughing, and we walked hand-in-hand out to my car.