The conversation between human and AI assistant.
When was underwear invented?
That's interesting. How has underwear evolved over time?
Over time, underwear has evolved to include different materials and styles. For example, in the Middle Ages, underwear was used for warmth and often made of wool. In the 19th century, cotton became a popular material for underwear. And in the 20th century, new styles such as thongs and boxers were introduced.