system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why is a bra just called a bra when it covers two things, but a pair of panties is called a pair when it only covers one thing?
gpt
We don't call them a pair of shirts either.  Panties came from pants, and pants originally came from hosiery, which came as two separate pieces.  We kept the "pair" nomenclature even after we starting joining the two leg pieces together in the middle.