On several adult fantasy fiction sites, I’ve read a number of fiction works which feature "re-writes" to history as either a core part of the storyline or a side-benefit to the storyline. 

Essentially, be it through anthropogenic or unintentional means, the characters are affected in some way by a gradual series of revisions of their pasts, usually without noticing the effects and believing that they have always been their transformed selves.

A subset of this trend, the "suggestion", incorporates the main characters trading suggestions which project their desires into a revision of each other’s pasts, again without the affected character being knowledgeable about the prior state of their lives or bodies. 

Within transformation fiction and the related transformation fetish, the idea that one of many "pasts" can be grafted into the individual character as a fact of the individual’s existence is enthralling for, if I assume, many readers, while it may give others pause or a sense of dread which parallels the post-Korean War paranoia concerning mind control and brainwashing by government intelligence services.