A little bit more exposition.

The audience of demons sat silently as they listened to Morginia's tale. Well, not entirely silently. Some grunts and wet slapping could be heard occasionally as most of her audience masturbated while listening. But they were all paying attention. Durkal looked at Morginia with a look of perplexed curiosity. "Wait, your goal was to stuff the human with so much demonic energy, that he becomes an incubus?" He was scoffing at her idea and initially dismissed it out of hand. After 284 years just sitting in the Grand Palace of Lust gathering energy, that was a LOT of demonic essence injected into that human. There were actual nerdy demons in Hell and it was estimated that the amount of energy a succ went through every ten years was about equivalent to that which existed in a human soul at any given time. He saw where the twenty years of celibacy came from based on that. If ten was the estimate, doubling to twenty was probably her making damn sure she had absorbed enough energy to get the job done.

Durkal's pet bitch-demon was yanked by her hair away from Morginia's slit and the blue incubus slapped the doggy in the face with his dick. Taking that as a hint she began licking him instead while her master continued the conversation, "Don't get me wrong Morginia, I absolutely love that idea. If we could do that, it would possibly open so many doors for us. But it isn't enough just to fill a man with lust essence. He needs to embrace it. He needs to act like a corrupter. He needs to encourage perversion both in himself and in others. And it isn't even enough for him to want to do it. He has to actually begin doing it."

With the dog-slut gone, Morginia searched the crowd and found an incubus that looked like a bit of a sub. There was a frailer one that had the word "sissy" permanently tattooed on one cheek and "slut," on the other. She didn't know him but didn't think the notion of him preferring a submissive role was a bold assumption. She pointed at him with one finger, then to the floor beneath her with the same finger. With a cold voice she just said, "Footstool. Now."

The demon responded by quickly crawling into position and letting the temporary mistress place her feet upon his back as Morginia placed a finger into her pussy and smiled, "You are correct about that, which is why I made so much effort to fill that boy up with other things as well. It's been so long that it feels like there are things about us and our nature that have been completely forgotten. Especially how it effects humans." She added a second finger to her cunt and continued. "Don't forget, the glow." She whispered the last two words quietly enough that only Durkal and a few of the closer demons heard it. Most of them confused as they had no idea what it meant but Durkal's eyebrows raised and some of his doubts visibly weakened.

"The glow?" He looked over the crowd and mostly confused faces. Considering how long it had been since demons and humans mingled it would make sense that none of them knew. Hell, most of them weren't even born the last time it happened. With a smile he used a touch of magic to make his features a little more human while a suit formed across his previously naked body. Trying to look at least a little bit like a human professor he sighed as Bitch dog girl was waved off to go and join the rest of the crowd.

"Succubi, incubi, and sincubi are all largely creatures made up of solidified lust, perversion, and sex. While capable of defending ourselves when pressed, every succ regardless of what form we take, when we get down to it, is just slutiness personified which I am guessing is something we are all aware of." In response the rest of his "class" all quietly let them know they were well aware of this fact so he continued. "Historically when one of our kindred has fornicated with a human, the human's soul was simply devoured by whoever they were fucking. Most of the time at least. The so-called "Glow" was a reference to the times in which the human was spared and allowed to live. When that happened said person was said to have an aura, a 'glow' about them. Because of our nature in relation to the nature of humans, our every bodily fluid can act as a potent aphrodisiac. Our jizz and pussy juice obviously, but also a succ's saliva, milk, sweat, urine, and even our very blood can cause a human to experience extremely intense, even uncontrollable arousal if exposed to large enough quantities. It can even sink into the skin and cause the person slight effects for years afterward."

As he said that he looked over at Morginia who was now basking in the moment as Durkal began giving her plan real credence for the first time. His tone of voice changed and it seemed less like he was talking to the crowd and more like he was thinking out loud, placing the links in the chain together piece-by-piece and getting more excited with each one. "It doesn't just effect the person that had sex with the demon either. Those that get close enough can even breathe some of it in and get caught up in the influence." He took a moment to look over at the succubus that was still in the throne he created and fingering herself, "And you drenched the fucker in your essence. He ate you pussy, licked your asshole, and drank your milk. You squirted all over his face and body. The kisses, the sweating, the piss. And after 280 years of holding back it's probably even more potent and that kid's body is consumed by it. You even drenched his clothes in your essence. That little shit is going to be irresistible!"

"And insatiable," Morginia added. Her proud and evil smile evident for the whole room to see.

The room was silent as they all considered her plan and eventually a sincubus broke the silence with a concern. "What about the angels?" All the succs in the room turned their attention to the speaker inviting him to clarify, "I'm young and don't even know any demon that was able to make it to the mortal world. Every time it's happened in the past though from what I hear, eventually the angels sense it and send someone to stop it. They cast their spells and just send whoever is there, right back to Hell. So won't that stop your guy if it happens?"

Morginia just smiled even wider and with more assurance as she had an answer for that question as well. "I was hoping somebody was going to ask me that one." She looked over longingly at Durkal, who was still in his fake human professor outfit, with a glint in her eyes, "Tell me professor, when the angels sent our kind back to Hell in the past, what was the nature of the spell they used?"

Durkal quietly thought for several seconds trying to figure out where she was going. He felt like this should be obvious based on the knowing smile on her face but it had been so long since demon dalliances on Earth were a thing it required a bit of digging through his memories. "Well, they used a banishing spell. Which sent any demons in the area back to whatever circle of Hell they came from..."

He was still thinking so Morginia decided to give him a bit of a leading question, "And why does that spell send them back to the circle of Hell that they come from?" Her masturbation was beginning to pick up steam as she hoped Durkal was getting closer to the answer.

"Because," he tried to remember the exact nature of the spells. When he did his mouth dropped open in realization and stunned silence. When he spoke it was with a tone of reverence, "The banishing spell sends creatures back to their home realm."

"And if the demon they cast it on was originally human and from Earth..."

"It would just send him back home. To Earth. Which means it wouldn't really do a fucking thing!"

As he said that, Morginia laughed out loud and begun spraying a river oF cum all over the chair she sat on and the floor beneath her. A few drops even went far enough to land upon her "footstool." As she came down from her orgasm, Morginia slowly slid off the chair and with a quick move soon found herself under the face of the demon that she had just been resting her feet upon. She stared up at him lovingly and sighed. "And what might your name be?"

"footstool," the demon said with a tone of pure submission in his voice.

Morginia smiled at the sissy slut's devotion before sitting up slightly and giving him a kiss. "Well footstool, you have been such a good and reliable foot rest, and I have had such a wonderful night on Earth that I would like to thank you. Would you like me to see if I can find a strapping incubus to impale that cute little sissy asshole of yours?"

From the look in his eyes it was clear that his answer was yes but that's not what he told Morginia. "I want to have that only if my mistress wants me to have that."

An answer that only made Morginia's pussy want to gush all over again. "You have no idea how much I missed our paradise these past few centuries." She wrapped her arms around footstool's neck, pulled herself up and locked herself back into another kiss with him. A much longer one this time, footstool returned it with greater passion and when she pulled away began to speak a bit more loudly. "What I really want to do is celebrate! There are so many demons in this room I haven't fucked and I want to fix that. I want you, "she looked up at footstool," and every other demon in this room to pound the fuck out of my pussy, my asshole, my mouth, my tits, and anything else you can think of. I want you all to run a train on me longer than any that has come before. I want you all to remind me what a lustful cesspit this place really is!"

As he positioned himself over the prone Morginia, footstool nodded and jammed his cock into her without mercy. "Of course mistress, your wish is my command."