Why do we buy a "pair" of pants, but a shirt with two arms is just "a" shirt?

I’d have to see the bra first (for verification purposes) prior to going along with such a wager. It would be best if it was modeled when I saw it. @SW-User

@jackjjackson I'm sure some women here would be more than happy to help you with that.
Just not me.

Surely you’re correct. However you brought it up. @SW-User

@jackjjackson You took a joke out of context. I'm not even sure why some women appreciate comments like that from total strangers on internet.

I have to say the same about you ma’am. It was obvious to everyone else it was a joke. @SW-User