What's up with a “pair of pants” in English? It's just one article

Why are pants and shorts plural, as in a ”pair of shorts”, when

Why does one refer to eyeglasses as a pair when there is only one

Can we say “a piece of clothes”? If not, how can we describe only

Why does one refer to eyeglasses as a pair when there is only one

Why do they call it a pair of pants, a pair of shoes, and pair of

Why are pants and shorts plural, as in a ”pair of shorts”, when

Can you say ' some pairs of jeans' like the plural of pair of

Why does one refer to eyeglasses as a pair when there is only one

Why do we use trousers as a plural and sleeve as singular although