It’s a good question. I looked up the answer. A thing is called a pair if it is always referred to in plural form only. So, trousers, glasses, pliers, tweezers, scissors are called pairs. A shirt is not plural so it isn’t referred to as a pair.
Why do people collect spoons? As a souvenir of where they’ve been. Ironically, most of their spoons would have been made in China. I was in a NPWS shop recently and bought a coaster with an aboriginal pattern on the top. It looks cool on my desk, but the sticker underneath says it was made in China.
