I love what you wrote about casual masturbation, but when I read "reality rewrite", all I could think about was someone growing and, every time they grow, reality adjusting to their new size.
A woman whose breasts grow and suddenly, her wardrobe updates to accommodate her newly swollen breasts. In fact, she can never remember a time when her torso wasn't completely covered by massive wobbling tits.
Another woman's ass swells up and the doorframes in her home suddenly widen, the woman still muttering about how the contractor overcharged her, putting off calling them again because her hips are starting to get stuck again.
A man's cock lengthens and thickens and now the drains in his house have been upgraded to handle the industrial flow of his unceasing cumloads, a tank in his backyard specifically designed to handle the torrent of cum that he pumps out multiple times a day.
A woman's milk comes in and now she has a very lucrative contract supplying half of the country with her milk, her house suddenly transformed into a massive warehouse that she lives at one end of and her udders take up the entire rest of it.
A woman's pussy starts to grow and now she has memories of when she outgrew her room, her apartment, her building, her neighborhood, her city, her pussy dwarfing the nearby mountain range and filling the valley with her femcum.
Oh fuck that's.... fuck that is hella hot. Sweet Troll Jegus.
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Some more reality rewrite ideas:
Someone fat donut engorges and constantly gapes between their quaking cheeks - or it would if it weren't currently stuffed with an obscenely large silicone insertion. Their memories and entire history shift because they've been training their hungry ass to fit larger and larger insertions all their life. They're slowly sliding down a missile silo erected for the sole purpose of housing a toy purpose built for them - and others like them. Reality has shifted to not just accomodate their need to stuff their hole... but to normalize it. It's always been completely normal okay for people to want to stuff themselves with larger and larger toys.
someone leaks so much pre that their natural lubricant is harvested to be sold in bottles as personal use lubricant across the world. The constant river flows into a massive overflow tank which has, itself, been overflowing for several decades now - as a new tank had to be erected around the facility, as a whole, to even hope to contain and process all of their juices. They're constantly edged, and never allowed to orgasm - not that they even want to.
and how can I forget a more recent favorite of mine:
Reality rewriting so that women have always been massive mounds of hunger and fat. That the literal defintion of a woman is not that they are human females, but that they are beings of pure gluttony. An entirely genetically distinct creature whose blubbery guts and quaking asses spread and grow to cover all. And that everyone else has always existed to feed them. To worship them.
