***Meanwhile, in the library***
"Luna, let me see!"
"Here... wow! Cho, this is not what I was expecting Hermione to be looking at!"
"Wha- wow! Oh my... this is, illegal, right?"
"Not illegal; it's technically an educational book. Just a little bit..." She blushed as she found the most thumbed page - showing a magical moving photograph of two women, one of whom had transfigured herself a penis. "Out there..." She shuffled uncomfortably in the chair as her pussy began to moisten, imagining herself being stretched by such a nicely proportioned cock. The witch in the photograph seemed to be having a blissful experience being gently thrust back and forth - eyes screwed shut.
"Oh! I, uh-" Cho stammered, turning red and shifting nervously. "What am I looking at?"
Luna flicked to the back of the book. "This appears to be a book of experiments published by a fantastically horny group of witches! I wonder why Hermione was looking at this? Is she gay?"
"Perhaps just a desperate nerd?"
"Or that." Still idly sifting through the well-worn pages. Stopping on a page entitled Entanglement: Sharing your Orgasms with your Partner in Absentia. "Ahah! She's got someone under her spell!" She gave sarcastic eye roll.
Cho had been completely fixated by the book, wide-eyes entranced by the sexual feast drawn out in captivating detail by the authors. She felt those feelings she had told Luna about before: the warmth and moisture forming in her panties, her increased heart-rate, the urge to do… something. Something from the book looked good right about now.
"Hey, Luna. I think I might head back to the dorm, if you're happy here. I'm not feeling… great."
"Oh, are you alright?"
"Yeah, yeah. Just might need a lie down. I'll see you later." And she picked up her bag and hurried slightly out of the library.
"She's not ill. She's horny." Luna said out loud to herself. Realising exactly where Cho was going and why, she blushed slightly at the thought of her and Cho entwined like the book described. Luna stood in the library, watching Cho almost jogging away, so desperate to masturbate that she couldn't even hide it at all. She figured her friend would probably have absolutely no idea what to do, and decided to follow her to show her the ropes.
Entering the girls' dorm, Cho was delighted to find the room completely deserted. It was the middle of the day, of course. Removing her shoes, she climbed onto the bed, suddenly quite anxious at being caught. She thought about some of the pages she had seen in the book and felt the familiar tingle of arousal return. It occurred to her that she had absolutely no idea what she was doing, and she wished she had a copy of the book to teach her. Completely unfamiliar with her own sexual anatomy, she lifted her skirt up and rubbed over the top of her underwear. She sighed deeply as a kind of warmth spread across her: it felt so much better than anything she had experienced before! Picking up the pace slightly, the enjoyed a pleasure she had never imagined before - was this an orgasm? As she continued rubbing, she felt her fingers brushing against damp fabric. Oh my God! Did I just wet myself? It didn't feel like she had peed herself. It actually felt quite... sexy, naughty even. She carried on, completely falling in love with the sensations her body was producing - far too absorbed to hear the door opening until the last possible second.
Quickly pulling her skirt back over herself, blushing heavily, she stammered:
"Luna! Hi! I didn't hear you, I'm just... not feeling great. Like I said."
"It's okay, I know you're masturbating. I came to show you how."
"Oh, um, I'm not sure, that - seems private?"
"We don't have to if you don't want to, but..." she began removing her tie and pulled her skirt down, stepping out of it. "I just thought since you told me you hadn't done it before we might do it together, and I'll show you."
"Er, Luna, I'm not... gay."
"We're not going to touch each other, nothing like that." She was sat on the bed by now, cross-legged in only her underwear.
"Well, um... I guess I really have no idea what I'm doing."
"What have you been doing?"
Cho blushed again and her eyes danced around the room.
"Just rubbing myself."
"That's a good way to get warmed up." Luna began doing it to herself, relishing the sinful situation they were in.
"I thought... I thought I'd wet myself, or maybe orgasmed...?" She lifted her skirt, showing the dark patch on her grey knickers.
"That's absolutely normal! You may have orgasmed, did you feel a big climactic rush and lose control of your body and mind?"
"No, it just felt better than anything else, ever."
"I'll show you how to orgasm. It helps if you get naked..." She could barely hide her smirk.
"Oh, that's... um... I guess so."
"Don't worry, I'll do it too, and it'll be our secret. Promise." She peeled off her own panties and bra, and discarded them to the floor. Encouraged by Luna's openness, Cho began removing her own clothes until they were both fully nude, sat cross-legged on the bed. Cho's pussy glistened - already wet from foreplay - her thick, black bush contrasting Luna's pale hair trimmed neatly down to a bristle - something she had done not long after discovering self-love.
"What now?"
"Have you ever touched your clitoris?"
"My... what?"
"It's a bundle of nerves - an organ - whose entire function is to make girls orgasm. Seriously, it doesn't do anything else. It's here." She used one hand to spread her labia apart and used her other to point out the little nub just above her entrance. Cho copied her, paying close attention to her own pussy as she searched. Quickly, she found her target and placed her finger on it, feeling a new wave of joy as she did so.
"Is this is?"
"Does it feel like it?"
"Yeah, I'm pretty sure this is it!"
"Good! Now, you might be different, but I like directly touching my clit with one finger and flicking quite fast and firm. Try it." They both touched their most intimate spot, Luna immediately closing her eyes, leaning back and enjoying herself; she was masturbating with one of the hottest girls in the year! After a minute or two, Luna went through the once-unknown leaking of fluid onto the bed. Reaching her finger down to her hole, she coated her finger in lube and returned to her clit.
"Is it supposed to be uncomfortable?" Cho asked, as she began finding it difficult to touch without it hurting slightly.
"It's supposed to feel good," panted Luna in response. "If it's not feeling good, try touching yourself like this." She demonstrated an open-palm technique rubbing over her labia in wide circles. Cho copied, moving in large, gentle, slow circles. Instantly she threw her head back and sank into the bed, sighing in ecstasy: this was the spot!
Luna switched back to her preferred method as she watched her friend drive herself to pure bliss. After a couple of minutes, Luna succumbed to her nervous system and came, right there in full view of Cho. Shuddering and gasping, her pussy contracted uncontrollably as she orgasmed. Seeing her playmate like that caught Cho completely off-guard and she increased her rubbing to an almost-furious pace - sending her state of arousal up to eleven. The same thing she had just witnessed now began happening to her: she encountered sexual perfection for the first time. Her hole body bucked and thrusted off the bed and she struggled to keep quiet. Her pussy flushed hot and her previously-soft clitoris hardened slightly beneath her fingers. A couple of seconds later, she reopened her eyes and saw Luna watching her - a peaceful glow on her face. Suddenly embarrassed once again, she used her hand to cover herself, much to her friend's amusement.
"How was that?" Asked Luna, cheekily.
"I think... I think I orgasmed."
"It certainly looked like it! Did you enjoy it?"
"It was nice. Really nice, actually."
"You're going to be doing a lot more of that now I'll bet!"
"Do you? Do it often, I mean?"
"Oh yeah, once a day minimum. I only started recently, but with a little practice and experimentation you'll improve really quickly. Now," she got up and began redressing. "I always get too sensitive to do it again straight away, so I'm going to leave you to... yourself and get some studying done." Fully reuniformed, she took one last hungry look up and down her partner's stunning body, turned and left.
Realising she was alone for probably not very long, Cho immediately started rubbing herself again, very gently as she became more and more turned on. Very quickly she felt her hand covered in a sticky fluid as she got faster and more deliberate. Thinking about experimenting she moved from her cross-legged position and laid flat on her back, pressing her head into the soft pillow as her sensed her commandeered by her new appetite for bodily pleasure. Before long, she was red and sweaty and she had another orgasm, rocking and shuddering again she was surprised by how much more intense this one felt. And how much wetter it was - she had covered all her fingers, her entire area was soaked and her hair matted against her skin.
She recovered, and rolled onto her side, hugging the quilt between her legs as she felt the hormonal relief spread all the way down to the tips of her toes. Resting for a few minutes to enjoy her near-spiritual elation, she pondered why Luna had followed her to the dorm. Wasn't it a bit weird for two friends to touch themselves together like that? She supposed Luna really was just trying to help, especially after their conversation in the hallway earlier. And to Luna's credit: her advice was pretty good! Strangely, she felt a closer connection between the two of them now, she guessed that most friends don't orgasm together. Smiling to herself, she slowly moved her hip, grinding her pussy against the cotton duvet - considering Luna's theory that everybody masturbates: even boys. Feeling her level of arousal and horniness increase again (she clearly had a lot of pent-up tension!), she reached down between her legs and discovered that her juices had spread all along the duvet. Opening her legs slightly to give her hand space to manoeuvre, she once again pressed against her clit, exhaling as she did so. In the mood for further experimentation, she rolled onto her front, spreading her legs. Laying half on the duvet and half off, she pressed the side of her head into the pillow and got to work slowly teasing out another orgasm. This was definitely the best position yet - she decided - as she quickened her hand and breathing. Before she even knew she was close, a third climax ripped through her body, forcing her to thrust up and down off the bed and a quiet, strained moan escape her open mouth. Keeping going for as long as she could, she raised her hips and pulled her knees slightly under her, raising her pussy off the bed and allowing for easier access. Almost ten seconds passed before she had to retreat her hand and leave her pussy to spasm on its own. Gasping for breath, flushed in the face, Cho rolled over onto her back and pulled the duvet off in an effort to lose some heat and noticed a large wet patch where her crotch had been. Had she really wet herself? This was a much bigger patch than she had seen on her undies earlier, but considering she'd had her only three orgasm since then... She reached down and ran a finger along her slit - clear, slimy fluid coated it; it definitely was just her orgasms, not pee.
Lying on her back, she continued gently rubbing up and down her new favourite spot, not trying to achieve orgasm again - she was far too exhausted and overwhelmed right now - just enjoying the relaxation and relief of finally releasing all that pent up tension she didn't even know she had. And she'd released a lot based on the mess she'd made of the bed! Luna was right: she'd definitely be doing a lot more of this!