Justin Bieber trousers may be more old fashioned that you think. The wide crotch trousers were invented 3,000 years ago.
Archeologists, Mayke Wagner and her colleagues at the German Archaeological Institute in Berlin found a pair of low crotch trousers discovered in Xinjang in China were 3,000 years old.
Trousers are a relatively new invention. Most people wore tunics, robes - skirrs and cloaks really. But when the Chinese started riding horses the trouser was invented. The wide crotch on the trouser they thought protects the groin so make horseback riding easier.