You don't know why there is a glass cage for a human in the zoo, but you get your answer relatively quickly. You feel an arm grab you and put one on your mouth and another on your waist, you can't scream for help because the one hand on your mouth acts as a gag to muffle you. You are being kidnapped. You get carried to a dark room and are stripped naked.
You are entirely naked, your navel, or bellybutton or belly button, penis, scrotum, and anus are all bare, exposed and naked.
You are put on an operating table. You see scientists but you are not able to move, you are restrained by restraints. Some scientists grab a syringe and they inject your penis, scrotum, and anus. Your male private parts such as your scrotum and penis wither away and die and they become your clitoris, urethral meatus and labia majora, labia minora, and vagina respectively. Your clitoris and Anus are seperated by your now exposed Perineal Raph. Meanwhile your Testicles, Vas Deferens, prostate, and urethra become your ovaries, fallopion tubes, uterus or womb, and cervix respectively.
You also feel something growing out of your butt just above your butthole. It feels like it is attached to your spine on your coccyx or tailbone like you are growing extra vertebrae, it grows to be 174 cm long. It rips out of your skin, and feels bony at first, but then it develops nerves, fat, muscle and skin. It is entirely naked, hairless, and bareskin. It seems to react either on it's own or on your emotions.
Oh no it is a Tail. A naked hairless bareskin human tail. you are now a Naked Human girl with a 174 cm long naked hairless bareskin human tail. You must look like a freak of nature because of this. Eventually you are put in the glass cage for the Human exhibit.