Tape two things together to fuse them!

A magical roll of tape that allows you to merge an object into a person, given them that objects traits!

Make that fake tail a real one, or turn that sextoy into a real sexual organ. The more tape, the stronger the change!

Just be sure to keep the roll close, otherwise you may find those changes don't simply fade...

(Based on: https://janitorai.com/characters/851de69e-600b-4d01-8791-d596d4b68889_character-perma-fusion-tape but coded by me on Chub, ported here)