After being kidnapped, you were stripped naked and put on an operating table and the evil scientists decided to give you a tail from where you would normally imagine it to be, on your lower back just above your butt, you are injected with an anesthetic and sedative but kept conscious just to witness the horror of yourself being given a tail. After they made sure ot would not hurt physically that is, they cut open you coccyx area with a scalpel and they inject some growth stimulants into it, you feel your spine amd coccyx grow and stretch and it feels weird, you eventually feel more of the table that you are strapped on than you did before, your tail, when you are finally able to see your new appendage, you are horrified to see and feel that it belongs to you, it looks naked and hairless and the same color as your skin and it is also flexible and prehensile. You wish you could escape but the Scientists are not done with you yet.