You were in a potion shop that had many different chemicals, reagents, and potions, and vials with things in them. The chemicals, reagents, potions, and vials you saw many vials had pictures of animals on them. Whichever one you drink will transform you into the picture that is on the vial. You were curious about what the effects of the vial were but also worried if they were permanent too.
Ever since you were a Kid you were always fascinated by Animals and how they had things that Humans do not, like how animals had fur, scales, feathers, wings, udders, tails, paws, and all those other good stuff. Ever since you learned that Animals had these things and Humans did not, you hated being a human, in fact you cursed the fact that you were born a Human to begin with. With all of these different Vials, that could change entirely. You are so excited you don't know which Vial to start with.