Sweetie Belle sipped at her tea. Rarity sipped at her tea.

“It’s called an orgasm, you know,” Rarity said offhandedly. Sweetie tilted her head uncomprehendingly.

“A rather uncouth term if you ask me,” Rarity continued, “But it gets the job done. It’s something every mare can experience if she is lucky and/or diligent, and every stallion too in his own way.”

“You are not alone in your feelings there,” Rarity said somewhere between seriousness and jovility. “Why, even I have had an orgasm before now and again!” she added with a hint of coyness to her voice. “Though certainly not in the same manner as you.”

“How have I had... an orgasm?” Sweetie asked, the word rolling strangely off her tongue.

Rarity seemed flustered at that, blushing and setting her cup down fussing over her words before saying, “Well, it’s... well in its basest form you would know it as the movements beneath your lady parts, you know, the ones that happen on their own?”

“Lady parts?” Sweetie asked doubtfully. Then her eyes lit up as she said, “Oh, because colts have different parts down there, so mine are lady parts.”

“Needless to say this is not language you should be saying at school,” Rarity said quickly, adding more slowly, “Yes, your lady parts. I may not be an awarded authority on the matter, but I am fairly sure you are having an unattended orgasm in your lady parts... seemingly every time you awaken!”

“Oh,” Sweetie said tiredly, “No, it’s only during the day.” The back of her neck prickled as she felt like someone had just warned her of something. She shivered, looking away from Rarity’s worried gaze.

“What happens at night?” Rarity asked curiously.

“I keep waking up and not having an orgasm!” Sweetie exclaimed huffing. “It’s really...” there was that feeling again. “...frustrating,” she said cautiously. “I’m too tense to sleep then, and I just want...” she gulped guiltily and finished with, “...want it to happen. I wish it would happen. Then I have to wait for the day, when I can sleep and it ...happens to me.”

Rarity’s tea continued to be forgotten as Rarity blinked at her sister disbelievingly.

“You mean to tell me you’ve only orgasmed unattended?!” Rarity exclaimed half standing up from the impromptu tea party.

“I don’t... know?” Sweetie Belle said uneasily.

“Have you never touched yourself there?” Rarity clarified with a worried look, “On your, you know, lady parts?”

Sweetie Belle frowned, saying, “Yes, when I wipe but why–”

“Sweetie Belle,” Rarity said passionately, “I cannot imagine what dreams you are having that you awaken to an orgasm, but there is so much more you could be doing to feel that way! No wonder you can’t sleep at night!”

“Really?” Sweetie Belle said hopefully, “Like what?”

Rarity pulled her head back with a leery hesitation, saying “Well you could... first you could...” and her voice seemed to fade to inaudibility as she said, “I could... show you...”

Sweetie Belle stared in open mouthed shock. She felt that dangerous sense of warning again, except this time it was a undangerous sense of open mouthed shock too. “B-b-but...” Sweetie stammered trying and failing to find words for how she felt about this, and all she could say was, “Would you really make me feel that way?” in a tiny voice.

“Sweetie, you’re my dearest sister,” Rarity said, pushing aside her tea and leaning onto the table. “If you are suffering for want of feeling that way, it is practically my duty to help you! You need your sleep, after all, don’t you? And I would be... honored to be your first...”

“Wait, my first what?” Sweetie Belle asked. Rarity just giggled lightly at that as though Sweetie had said something very silly.

“Don’t you worry, Sweetie just let your sister Rarity take care of you,” Rarity said affectionately, walking around the table to where Sweetie sat. She gave Sweetie a cursory look and added, “Although I am going to have to touch your lady parts,” in a critical tone, “I wouldn’t want you to feel uncomfortable after all. So do tell me if doing that bothers you.”

Sweetie smiled at her gratefully, saying, “No, I think I would like that.”

“Excellent!” Rarity exclaimed excitedly, fiddling in place on her hooves as she said, “If you will accompany me to my bed then, we can have you on the road to recovery in short order.”

“Do we have to sleep?” Sweetie asked speculatively. It is after all what she’d known so far.

“Oh, no no no,” Rarity corrected her gently, giving Sweetie Belle another head pat. “It’s merely much softer and more pleasant than simply doing it on a dirty hard floor. And it’s a gesture of trust, in a manner of speaking. Letting you into my personal space, as a show of vulnerability on my part.”

She nuzzled Sweetie warmly, saying to her in an educative whisper, “Never lead anypony into your bedroom who isn’t very special to you.”

“Now if you’ll follow me,” Rarity said walking toward the stairs with an elegant tail swish. “I would most appreciate it,” she finished under her breath incredulously.

Sweetie Belle followed her sister up the stairs to where Rarity’s private bedroom lay, following hesitantly, but also with the thought of that feeling bubbling up in her, somewhere between hope and hunger.