system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why do we say a ‘pair of underwear’ when we are only wearing one?
gpt
A pair of pants really used to consist of three separate parts (left and right leg and middle) and even longer time ago it was like just the 2 leg parts that got tightened to the legs and longer clithes for the upper body for males and females. These clothes were common till the 16th century.