I am not sure how much it really has related to the topic at hand, but I know that http://chyoa.com at least has various other sexual body modification stuff.

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>>16976
Wait, BEarchive has stuff relevant to this thread? How did I not know this! I just thought the site was for breast expansion stuff...

Does anyone have a few links to get me started?

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>>16982
Don't forget about the various guillotine sequels! But more importantly, there are in fact actually stories dedicated to the subject depicted in this thread:

Unusual Body Part Swap:
http://www.writing.com/main/interact/item_id/1901362

Weird Morph & Swap Story:
https://www.writing.com/main/interact/item_id/1832686


Additionally here are more that I think have chapters relevant to this thread, but my memory is fuzzy so I'm not entirely sure (it'd be difficult for me to check right now since I usually have to read them at ~06:00 UTC or so in order for their server load to be light enough for free members to view):

Changing the World: Remote Control:
http://www.writing.com/main/interact/item_id/2035757

Female Butt Morphs (and more):
https://www.writing.com/main/interact/item_id/1914877

Magic of Perversion, The New Host:
https://www.writing.com/main/interact/item_id/1867724

Reality Altering Laser Katana:
https://www.writing.com/main/interact/item_id/1991048

Shadow Swap:
https://www.writing.com/main/interact/item_id/1926844

Transforward:
https://www.writing.com/main/interact/item_id/1934303