Well my favorite scenarios are...
> Playfighting turns into sex
> Walk ins and accidental scenarios
>wormholes/portals
> or any supernatural power that doesn't involve a phone app
> young stud who can hardly control himself and a woman that should but can't say no (not exactly underused)
> man cheats on wife (surprisingly rare)

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>>8774418
There's this short strip from "A Mad Look at Cops" by Sergio Aragones, and I always thought it'd make a fantastic porn premise. Shame it hasn't been done already.

>>8775943
>And so... They Were Both Cops.

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>>8774418
>Underused Scenarios
Actress doing risky rape scenes for mainstream movie. Kinda like Perfect Blue where the FeMC idol turned actress is offered to do a gang rape scene.
There are quite numbers of eromanga that does this but almost all of them have the FeMC do AV/porn movie instead of mainstream movie.

>>8774418
Split-screen delusion scenarios, top panel contain people having imagined sex and the bottom panel just them acting their life normally.

Saw the concept in a JAV but couldn't find much doujins about it.

>>8774418
Murder mystery hentai version with the main detective having sex with the suspects and witnesses. Maybe flash games used to have those kinds of settings but I couldn't remember much anymore.

>>8774418
Anything with tension and initial awkwardness / reluctance from both parties. In general, the idea of "scenario" itself isn't given the respect it deserves

>>8774797
>Playfighting turns into sex
> Walk ins and accidental scenarios
True. Too bad that "accidental sex" is a meme and every time it comes up it's seemingly the same ones.

I hate incest but love the idea of a son discovering his mother's hidden dark and perverted side.

>son discovers mom is working part-time as a prostitute
>she always works out of the same room in the same hotel
>decides to become her secret bodyguard
>hides cameras in the room and stakes out in a building nearby
>if anything goes wrong, he can rush in and save her
>collects blackmail material against her clients
>still has to sit and watch whatever weird, niche fetish her clients pay for her to carry out

>>8774418
Any hypnosis that isn't "I showed you this spiral gif on my phone/waved a ten yen coin in your face and now you're my onahole"

In fact, the only one I can think of off the top of my head is "The Devil in Your Subconscious: The Real You"

>>8774418
Happy ending massages, both men and women. It's a big fad in porn/JAV right now but incredibly underused in hentai for some reason.

>>8774418
Possession is pretty cool but also rare. You basically only see it sometimes in Game Over Rape games where the defeated heroine is taken over by the ghost enemy and while possessed go back to town to whore around.

There are a lot of variables to play with (is the original's soul aware? does she remember the actions of the ghost or does she have to put the puzzle together the following day?)

>>8779498
Hypnosis in general is kind of a wasted concept
There's a lot that could be done with mind control in hentai, but they always just go for the most obvious "I will now fuck you."
Pimping girls out
Making them reveal hidden fetishes
Getting the hypnosis turned back on the hypnotizer
Making them change personality
Failed hypnosis but the victim goes along with it
Women hypnotizing men
Different levels of awareness while hypnotized, like knowing what's happening but not being in control of your body, or being unable to acknowledge your sexual actions but being otherwise entirely lucid
But no 19/20 times it's just "Uoh look at my pink spiral, I will now cum in your limp starfish pussy"

>>8781942
>Getting the hypnosis turned back on the hypnotizer
Only doujin I could think of is this but it's been set up by the FeMC from the very beginning. Normally if that happens it would get the MC arrested if anything.
https://exhentai.org/g/3144596/194b060ad8/
https://exhentai.org/g/3126714/1d2acc0689/

I can't get into any loli stuff that doesn't depict signs of puberty. If they don't look like at least "junior women" (i.e. Megumin) it all just makes me uncomfortable, not excited. I know board rules say no loli, but surely I'm okay to just talk about it a bit?

I'm also a fan of mesugaki traits on grown women. I don't know if there's a tag for that.

>>8784619
if there are signs of puberty it's not loli, it's hebe

>>8784658
Yet most civilized people in this age of the world would see it as distinction without a difference.

Besides, what sites have a "hebecon" tag or equivalent?

. . . . . .

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>>8774418
Anything with role reversal. Literally take any concept and flip the male/female roles. I wish we were in the world of Teisou Gyakuten Sekai.

>reverse rape
it's kinda common but not as much as I'd like. searching for "femdom" mostly gets you dominatrix humiliation porn which I'm not really into. I want stories where the girl physically overpowers the guy, or at least has some sort of leverage over him. Blackmail, drugs, whatever. Also important that the guy isn't immediately into it

>reverse time stop/hypnosis
I've only found a handful of doujins where girls use timestop or hypnosis powers to be complete degenerates

>reverse prostitution
women paying men for sex is (mostly) unthinkable in our world, so it's nice to imagine a girl who's desperate enough to offer 100,000 yen to sleep with you

>>8785004
>>reverse time stop
I wish those were easier to find since the time stop tag was for general use only

>>8774418
Doujins that feature school uniforms of other countries. It's always the japanese design, even if the creator wasn't japanese.

>>8781942
You are right that most media boils it down to, "watch the trance item, ok now don't move while I fuck you."
While not hentai, I recall reading a story that was probably one of my first exposures to erotic hypnosis years ago and it covered just about all of those tropes and I've yet to find any mind control hentai that comes close to using as many.
Story went something like
>rich uncle dies
>MC goes to settle his estate
>MC finds ipod that puts people in a trance
>girl next door comes over every day at the same time
>apparently to get hw help from uncle, but he's dead, and she keeps feeling like she has to show up, doesn't know why
>MC investigates, finds video that uncle took of hypnotizing various women
>trance and asking about their fetishes/kinks
>MC trances girl to fix compulsion, but makes her more confident about her body
>also adds trigger phrase to get her to agree with whatever suggestion is made to her
>shenanigans happen where people MC hypnotizes realize something is happening and either post hoc rationalize that they did want it, or don't like that they aren't in control
>does things like make people feel a certain way or imagine something without being compelled to act on it to see what they do
>ask tranced girls about how they feel about him, makes a subtle change, checks back in later to see how they feel changed
>i think girl next door also knows about the ipod and is either told to be into or is actually into other girls getting hypnotized by the MC
>at one point, of the girls uses the magic ipod on MC to give him a taste of his own medicine
>MC's dad has and old, desk sized model of the magic ipod
>uses it to do business deals, hire hot chicks, program them to fuck him/his clients
>MC over
>girl next door tired of being manipulated goes off and gets her own boyfriend
>boyfriend figures out trigger phrase since was something like "Are you sure about that?"
>fb pimps her out to friend's rich dads or some shit
>mc rescues her

>>8776016
Is this a real doujin or just one-off fan-art? Either way, sauce pls.

>>8774797
> man cheats on wife (surprisingly rare)

And wife secretly knows about it and loving it

Mother pimping her daughter or mother helping with raping own daughter.

>>8793437
Female netorase

I like femdom but the men are badass subs.
So a concept I have is witches that can channel power only through a male who is horny for said witch, and remains her submissive.

The witch seduces the man, shoves a buttplug in his ass, and provides him power through the plug.

The man gets power, but has to remain the witches loyal slave-husband to stay powerful.

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ruined orgasms

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>>8789909
Don't know. Found it on /a/. Shit's hot as fuck.

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>>8774418
Behind the scene social media post where actor teases the explicit scene of a series they are filming.

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>>8794131

>friends to lovers, but either really fast or really slow
>awakenings
>woman rapes man (no strapons)
>little bit of size diff (4'11 on 6'4?)
>small dick worship (yaoi included)
and last but not least, the 69 pose in yaoi

>>8794160
also forgot to mention waking someone up with head

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I call this one "It looks like takarazuka but due to copyright law, it's not."

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>>8795406

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>>8795414
This one took me time to find but it's really sweet