Courtesy of Wikkipedia and Google. (Remember the days of using books for research?)
* Nomadic Eurasian horsemen/women such as the Iranian Scythians, along with Achaemenid Persians were among the first to wear trousers, later introduced to modern Europe via either the Hungarians or Ottoman Turks. However, the Celts also seem to have worn them in ancient Europe.[citation needed]
In ancient China, trousers were only worn by cavalry. According to tradition, they were first introduced by King Wu of Zhao in 375 BC, who copied the custom from non-Chinese horsemen on his northern border.
Trousers were introduced into Western European culture at several points in history, but gained their current predominance only in the 16th century.
The word itself is of Gaelic origin, from the Middle Irish word "triubhas" (close-fitting shorts).
*This is Mr. Pants:

* No Pants Day
Fancy Pants
Created by: Nikkitaaw chris, i bet those pants look great on you!
Love those pants Nikkita!
Show me your best pair of pants. A conundrum. A pair of pants = 1 pants. What will they think of next?