Here in Merr-Ka folks in the south (Our most beloved conservative and charming religious folk) invented a drink they call "sweet tea". (They actually pronounce it "sweetea" (one word like that.) Its basically normal tea, which they then add sugar while warm, keeping the temp up and adding more and more sugar until its supersaturated, such as what they do with soda.
The resulting supersweet concoction is an abomination to tea drinkers everywhere, but we seem to love it here in the states. SO much that its become the defacto standard for when you order "iced tea" or simply "tea" in most places. So if You just order tea you get that slop, instead of lightly sweetened (like with 2 lumps) tea.
Therefore we have come to call tea that isn't sweet tea - "unsweetened tea".
http://www.snopes.com/food/prepare/suntea.asp
Snopes says its true, and i've read the CDC report. There IS bacteria on teabags and in tea and brewing it in the sun might fucking kill you.
Just saying.