Here's why:
* Metaphor: A metaphor is a figure of speech that compares two unlike things without using words like "like" or "as." A teapot is an object, while a building is a structure. The teapot-shaped building makes an indirect comparison between the two, drawing attention to their similarities.
* Visual Aid: The image of a teapot-shaped building is visually striking and memorable, making it easier to connect the image with the concept of metaphor.
While a teapot building might be a fun thought experiment, it's important to remember that metaphors are often used in language, not architecture. They can be a powerful tool for creating imagery and understanding.