Why are bra singular and panties are plural. Should it be the other way around since bra do more?

Question

Why are bra singular and panties are plural. Should it be the other way around since bra do more?

Answer 1

The word bra comes from the word brassiere

The French word brassière refers to a baby's vest (undershirt) or lifebelt, underbodice or harness. The word brassière derives from bracière, an Old French word meaning "arm protector" and referring to military uniforms (bras in French means "arm"). This later became used for a military breast plate, and later for a type of woman's corset. The current French term for brassière is soutien-gorge, literally, "held under the neck" or "throat-support". In French, gorge (throat) was a common euphemism for the breast. This dates back to the garment developed by Herminie Cadolle in 1905.

Pants (short for “pantaloons”) may refer to the following:

Trousers (North-American English), an outer garment covering the lower half of the body, encasing each leg separately

Underpants (British English), an undergarment covering the genital region  

Answer 2

It depends on what country you are from. Here we say:

singular: bra/brassiere (even though brassiere seems to be more commonly said)

plural: bras/brassiere

singular: panty

plural: panties

Answer 3

yes it should.........me and my friends were just thinking and talking about that to the other day!

none of us get it eaither