Not bad. My only critic here?

but we’re all adults here.

I thought these are students, unless they were aged up...

“Love, not lust, not even passion. Just love,” Cadance hung her head, hoofing at the floorboards,

Let me get this straight: she's the Princess of the generic concept of emotional connection between two people. Huh. That's completely useless! I'll shelve my concerns about contrivances for the time being. Do go on!

Actually that was kind of always my interpretation. It's kind of like the power of "Heart": it sounds lame but it's actually overpowered in the hands of someone with some imagination and few morals... stupid morals. XP

That letter at the end...

This was oddly hilarious.

Ha. Awesome.

I died laughing so hard at this. I needed this in my life. Thank you.

7304439 I'm not sure who I'm more disappointed with. Me for writing that mistake in the first place, my proofreader for not noticing it, or the over 2,000 people who read this and didn't say anything!

Thank you for pointing it out though.

swaying back a forth

and

to comprehend was was happening.

what was happening.

Pinkie speed out of the room to change.

sped

we’ll be starting out sexual education unit.

our

Cheerilee’s gaise

gaze

suggestively suggested Shining Armor

Painful redundancy in word choice.

You’re faithful student

Your

7304459 Interesting tidbit: If you reply to someone on a different chapter than the one they commented on, it doesn't pop up in their notifications. I only spotted this comment because I just got done proofreading your second chapter.

More please! This was the best story! :D

Seriously though, why are 200 people tracking this story? It was marked as completed!

Whatever! I do what I want!

7304515 I had no idea that's how it worked. I've just always responded from the main page of the story, so this is good to know. Also for the "suggestively suggested" wording: it was supposed to be painful. Thank you for the proofreads and sorry that you had to do so.
-Calm

7304669 This is my story you will follow my rules here! Good thing what you're doing is within the rules.
-Insane

This was hysterical, I want more!

Grammar,

Cheerilee buried her face into her hooves as as Pinkie skipped over to her desk and pulled the oversized lollipop out of her mouth.

One "as".

It took until Pinkie Pie had removed her rear stockings and was turning around to present herself to the class for Cheerilee’s brain to comprehend was was happening

I have a feeling auto-correct turned a "what" into a "was" here.

~Leonzilla

So maud basically doing the "funny dance with The Rock" in the field reminded me from when I studied Hinduism that in Hinduism there is a thing called a Shiva linga it is a rock that is naturally shaped in the form of a penis. Like as long as it's elongated and ovalish that's the shape of the Shiva linga also there is another rock that is called a yoni it represents the female vagina and is of the Goddess Shakti.

O geez we need to have a Cheerilee/Pinkie chapter and Cadence and Shining need to interrupt it. How was it going before the interruption? Who knows but it would be funny to find out.

Who gave Pinkie 'The Talk', her sisters?

7304886 Gosh darn it I thought I fixed that! I will kill the save button!
-Insane

On an unrelated note: I will be writing at least one more chapter for this. Taking into acount how fast I normally write, expect it in no less than a month's time.
-Calm

7305067 You could do so much more tho.

Not only getting someone to proofread the letters provides an opportunity to involve another type of character in this loop of shenanigans, but also provides enough ponies counting Cheerilee and Cadence to go around back and forth exploring more topics as Pinkie becomes more adept at Sex talk and Sex Ed.

This has the potential to become a series.

~Leonzilla

7305170 Oh I said at least one more. Right now I only have an idea for one more chapter, possibly two if it's too long, but as long as I keep coming up with ideas I'll keep writing them.

I am really happy that I'm allergic to eclairs right now, but I will never be able to shake the disturbing images from my mind when I see somebody eating one

Wait, there's more!?

“Pinkie, there is no Yakyakistanian transfer student in my class. Our school doesn’t require uniforms. And you’re still far too old. My day is going to be hard enough as it is, please find somepony else to bother,” Cheerilee grumbled, pushing Pinkie out of the school house.

With that Cheerilee walked to the front of the classroom and addressed the class, “Before we begin todays lesson I need everypony who hasn’t already to turn in their signed permission slips.”

You need some transition between those two. I would assume Pinkie came in before the students for her initial attempt. Of course I could be wrong and you may have meant that they were mostly sitting there at the time.

A quick sniff of the air and Cheerilee knew that groans weren’t all that were arisen by Pinkie’s little display.

How good are horse's sense of smell? I don't think a human could smell that at more than arm's length. And even adolescent males probably aren't going to go to quite that point THAT easily, but I suppose that doesn't make a joke then. Then again, can't speak to the female side of things.

The last couple paragraphs are just... I don't even have the words. XP

On a related note, if I recall correctly, by the time my school actually taught sex ed, the only new thing I learned was how gross certain STDs look. Wasn't until 9th grade, for some weird reason. My dad had taken me to a privately run sex-ed class years earlier, which I think existed largely because of the weird way the schools had it set up.

Might want to change all the mentions of hands to hoofs. Just use the find and replace tool if you use google docs.

7313538 I had totally missed those. There were only two instances that I felt needed to be changed, but that's two more than there should be. Thank you.
-Calm

Funny chapter.

“No questions? Alright then I have a question for all of you. Does anypony have any guesses about any of the changes that happen?” Cheerilee asked. Pinkie’s hoof immediately shot up. Shit. “Any answer you give is right, we are just listing ideas after all.”

I think the paragraph would flow a lot better (especially in light of how the next paragraph begins) if you rearranged the sentences a bit. Like so:

“No questions? Alright then I have a question for all of you. Does anypony have any guesses about any of the changes that happen?” Cheerilee asked. “Any answer you give is right, we are just listing ideas after all.”

Pinkie’s hoof immediately shot up. Shit.

“Guten Tag misses teacher lady! I am new student from Yakyakistan. I am here to join your class today. Here is permission slip. Ya,” Pinkie Pie then put a piece of paper on Cheerilee’s desk.

Yaks are German?

I don't get it, what does Cadance think happened?

P. S.
I want more. Badly.

7630177 Re-read the letter, but immagine Pinkie Pie is talking about sex.
-Calm

-Insane

7630439

I got that! I just don't get it, I don't know why. Maybe you could make another chapter based on what Cadance thinks happened. As if she were right.

After taking a deep breath, Pinkie Pie started swaying back and forth as a saxophone began playing sensually smooth jazz somewhere in the distance.

I had to go back and read the letter again for a second to figure out what Cadence was upset about...

“Oh my gosh we hadn't even thought of that!” Sweetie Belle gasped, “We are so sorry for trying to set you up with Big Mac.”

At least they're considerate...?