Midnight Anal Conditioning
"Is it always like this for everyone...?" Indeed, it seemed there was a very good reason people called it a "back pussy."
To begin with, though I had never used my anus before, I knew quite a lot about pussies. When it was time for sex, a pussy would instinctively twitch and gape, secreting love juice to prepare itself for a lover's fingers or tongue.
"It really is like a pussy..." In that sense, my anus could easily be considered one. As if it somehow knew I secretly wanted to try masturbating with it, the entrance was twitching and gaping all on its own, practically begging me to insert something.
"So that's why they call it a back pussy..." Yes, there was a reason everyone referred to the anus that way. Lost in these thoughts, I gently brushed my index finger against the puckered folds of my anus.
"Hic...!" I gasped, instantly pulling my hand away.
"W-was it always this sensitive?" Ever since the medicine's effects started kicking in around the second day, my trips to the bathroom had increased dramatically, but everything had just poured out like water. Because of that, I hadn't really had to use my backside, but could a mere two days make it this sensitive? Or was this another side effect of the medicine? A sensation very similar to when I first touched my clitoris was bubbling up inside me.
But... "J-just a little more..." I knew by now that pleasure awaited at the end of this sensation. When touching my nipples. When touching my clitoris. When rubbing my vaginal entrance and sliding my fingers inside deep enough to touch my hymen. These were facts I had learned by masturbating and exploring my own body.
So, to keep my body from tensing up in surprise, I slowly caressed and stimulated the puckered folds. And then, gradually, my finger began to slip toward the very center where the folds gathered...
"Huh...?" I tried to slide it in, but... unfortunately, the human anus was not an organ that easily accepted foreign objects from the outside. I wasn't someone who regularly practiced anal masturbation, nor had I applied any lube before trying to insert it.
"Ah, well, I guess it's only natural that it won't go in..." Shaking my head at the futility, I contented myself with tracing the outer folds. It was a novel stimulation quite different from my pussy or clitoris, and after enjoying it for about thirty minutes, I headed to the kitchen to prepare breakfast.
Night fell on the fourth day of her anal conditioning.
"Roen..."
"Echidna..."
It was one thing for Echidna to be overflowing with lust for Roen as usual, but recently, a change had come over Roen herself. Her sudden retreat to her room to masturbate by touching her anus was part of that change.
"I wonder what it is about me that you like so much to summon me to your bedroom every single night. You never used to insist on sleeping together like this before."
"What does it matter? You are my wife, Roen. Isn't it only natural for a wife to sleep beside her husband?"
"Hehe, is that so?"
Her current behavior—coquettishly teasing Echidna—stemmed from the exact same source. Roen was, without a doubt, feeling genuine sexual desire toward Echidna. Normally, Echidna would ravish her before she even had time to process these feelings, making them irrelevant. However, because Echidna had spent the last few days focusing entirely on developing Roen's anus, the conscious Roen had no way to satisfy her rising lust. What she was experiencing now was the backlash of that deprivation.
To have sex so frequently that it became a daily routine, only to suddenly be left untouched during the day and subjected to imperceptible anal development at night? After a period where her brain was practically melting from dopamine and estrogen, this sudden, forced celibacy was impossible to adjust to, leaving her incredibly restless. Roen's current behavior was an unconscious plea for Echidna to ravish her, but...
"Mgh, nnh..."
"Chu, chupp..."
Unfortunately for Roen, developing her anus was far more important to Echidna right now than addressing her wife's sexual frustration. Echidna merely indulged her with a deep kiss while secreting her sleeping poison, showing little interest in actually relieving Roen's lust.
"Haa, Echidna... Echidnaaa..."
Desperate to resolve this agonizing tension, Roen clung to Echidna's body and whispered pleadingly, but...
"Fuu, Roen..."
"Ah..."
As Roen closed her eyes slightly at the sharp pinch of Echidna leaving a hickey on her neck, the sleeping poison—potent enough to instantly fell an elephant—surged through her system. Drowsiness claimed her in an instant, and unable to resist any longer, Roen drifted off into a deep slumber.
"Are you asleep?"
"Mnnnh..."
"You are."
Even though Roen's breath was unusually heavy with lust, Echidna paid it no mind. She swiftly maneuvered Roen's limp body into a cat-cow pose, perfect for anal conditioning, and admired her wife's back pussy—which was now in a permanently sterile state even without the use of Cleanse.
"I'll turn this anus into a proper back pussy in no time."
Ultimately, the method Echidna chose was aphrodisiac conditioning. Trying to sync the sensitivity of Roen's anus with her clitoris and vagina using resonating egg vibrators was a slow, abstract process. However, if she corrupted Roen's anus into a female hole thoroughly drenched in aphrodisiacs, she could transform it into a custom fleshlight for her jaji in just a matter of days. For Echidna, who was staking everything on developing Roen's anus, shifting her grand strategy was only logical.
"Slurp, lick..."
Echidna diligently licked Roen's anus, coating the inner walls with her specialized aphrodisiac. Her plan was to apply it to a depth of about ten centimeters for now. While that was far shorter than the length of Echidna's massive jaji, when they eventually had anal sex to test her progress, they would be starting with fingers and tongues rather than her member. Ten centimeters was the ideal depth for finger insertion, so soaking that area in aphrodisiacs was perfect. Once conditioned, even a simple, shallow thrusting motion of a finger would send Roen thrashing in a wild climax.
"Mmh, chu..."
Echidna carefully applied the aphrodisiac to the ridges of Roen's rectal walls like a meticulous painter coating a new house. Though they felt somewhat plain compared to the complex folds of her vagina, Echidna had no doubt Roen would love the results once the drug was thoroughly applied. She also made sure not to skip the soft, pink outer folds of Roen's anus, which would bear the brunt of the foreplay.
"Since the G-spot is located on the anterior wall of the vagina, curving toward the belly... slurp..."
She took special care to ensure the vaginal wall near the G-spot would react with extreme sensitivity. By making this area highly sensitive, any stimulation from a finger inserted into the anus would press against the G-spot from behind, sending Roen into a state of heat and filling her mind with pure pleasure. Of course, this method carried the slight drawback of making her G-spot react unpredictably during normal vaginal sex, but...
"Hmm... does that even matter?"
After all, for a weak, sensitive pussy like Roen's, there wasn't much of a difference between receiving a baseline of 100 pleasure from her G-spot or an aphrodisiac-boosted 120. It was far more important to elevate the pleasure she felt from her anus pressing against her G-spot from a measly 5 to a staggering 70. She was turning Roen's body, quite literally, into a human fleshlight.
"Besides, once I tell her about my jaji soon, Roen will spend all day impaled on it anyway..."
When that happened, G-spot or not, she would be living a life thoroughly drenched in pleasure 24/7. Developing her G-spot a bit with aphrodisiacs wouldn't pose any real issue.
"Yeah, it'll be fine."
Feeling zero guilt, Echidna slathered a generous amount of aphrodisiac onto the vaginal wall directly beneath Roen's G-spot. Now, for the next step...
"It's been a while since I used Roen's tit-pussy."
Since the aphrodisiac applied to her vagina and anus needed time to absorb, Echidna wrapped her tail around Roen's waist to secure her position. She then slotted her massive, throbbing shaft right between Roen's cleavage and began thrusting her hips back and forth. Every inch of Roen's body already belonged to Echidna.
She had a dream.
"Uh..."
Like most dreams, it was completely nonsensical. I was swimming and playing around in the mansion's massive, empty bathhouse.
"Wait, wh-what?"
Suddenly, the hot bathwater began rushing directly into my anus.
"Aaargh! Ah, aaaah!"
I screamed. It was bathwater—water that was two or three degrees hotter than human body temperature. Imagine that hot liquid suddenly flooding into your delicate, sensitive anus. How could it not burn? I screamed at the top of my lungs, begging Echidna to save me. How much time passed like that?
"E-Echidna! Echidna!"
Echidna saved me. But...
"..."
"Ah, aaah! Echidna! It's me! It's Roen!"
Echidna said nothing. Without a word, she grabbed me by the hair, dragged me along... and shoved me straight into some kind of torture device. It was a bizarre contraption that bound my arms and legs together, suspending me in midair while leaving my pussy and anus completely exposed. And the moment I was locked into it—
"Gasp...!"
I woke up from the dream.
"Haa, haa... whew..."
It was a terrifying nightmare. A chilling nightmare that felt almost like a premonition of what was actually to come.
"That scared me to death..."
Shivering, I muttered to myself as I snuggled deeper into the arms of the sleeping Echidna. There was no way Echidna would ever grab me by the hair, drag me away, and lock me in a torture device. It was just a silly dream.