system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is a pair of pants called a pair if there's only one item?
gpt
People think the plural refers to the fact that there are two legs on the garment.  In fact, the plural refers to the fact that the garmet was always accompanied by another similar garment worn underneath.

The term "pair pf pants" refers to the outer garment and the under garment.

They get their name from an old italian clown named Pantalone who, like all clowns back then, wore tights and was actually funny.