[M4A] The Too-Much-Information Device
An artifact exists with the power to reveal every single thing, every private detail, no matter how deep in their unconscious, about the sexual preferences and desires of the people you look at. To put it another way, it confers you superhuman acuity of observation into the erotic unexpressed of people around you.
Maybe it's a pair of glasses. Maybe it's a technology that is not yet ready to be mass produced and only a few prototypes exist. Possibly it's a magical item, an amulet of sorts. It could be unique, and nobody else knows about its existence. It could be a well-known object of research. We will call it the Too-Much-Information Device, or Tumid for short.
What can you see with the Tumid? Well, it's not exactly that you *see* things. They just become apparent to you, with the strength and clarity of the most developed intuition. But the Tumid makes no error, and you will always know for sure.
You look at this man and you will know that he has a poor sex life with his spouse but he secretly craves to see her fucked by other men. You cross path with a young woman and you know she's deeply a submissive slut into the most fucked up taboo shit. And this other guy, oh, he's so much into you and clearly imagining you naked.
How far can the insights go? How would you use the Tumid for yourself? Or how would you feel if you knew someone is using it around you?
If you're into this kind of speculative weirdness. What about there exists a counter-device to hide some or all of you from the indiscreet eye of the Tumid?
(This will be a lot about world-building)