A great pair of...

Food: General Tso’s Chicken
Song: Promise – Eve 6
Quote: “Why you gotta keep the fan on high when it's cold outside? Just want to let you know that I'm still a fan, get it? Everybody wants charm and a smile and a promise. I promise not to try” - Promise

Could someone please explain to me why exactly it is called a “pair” of underwear? Come on people! A pair of gloves, a pair of socks, a pair of aces… these things I can understand. But a pair of underwear? This is not just some expression that only a few select people use. No no no, this is a phrase that people say everyday. Ok, well maybe most people don’t talk about underwear everyday… unless of course you work for Hanes or Victoria’s Secret, then I would imagine you say underwear a lot. – butt (snicker) back to the point -
Pair:
1. Two corresponding persons or items, similar in form or function and matched or associated.
So according to this definition, who ever really puts on a “pair of underwear”? Go ahead, check. Take your time. See, just one piece of material between you and your jeans. Unless of course there is nothing between you and your Calvins. Then you my friend are in a class of your own.
Next is this definition:
2. One object composed of two joined, similar parts that are dependent upon each other.
I guess with this one, you could get by… by the skin of your teeth (another wonderful expression). You could consider the fact that the two leg holes “similar parts”… I guess. But still it just doesn’t work for me. I guess this one would work for a “pair” of pants. I have the same problem with this expression. Once again, look down and check… only one. As for the underwear… I give up.
Of course, if you wear a thong… you don’t have this problem.
g’night folks