Ever you ever wondered why these small non-functional pockets in our trousers exist? Let's take you back to 18th century!
The small pockets were originally used by cowboys for keeping watches or chains. According to Levi Strauss, a worldwide wear corporation, "Originally included as protection for pocket watches, thus the name, this extra pouch has served many functions, evident in its many titles: frontier pocket, condom pocket, coin pocket, match pocket and ticket pocket, to name a few."
So, enjoy the 'little pocket' of your jeans!