The real reason for that annoying little pocket in your jeans.

The “fake” pocket is a seemingly pointless adornment all too familiar in women’s fashion.

No tiny pocket is more iconic and useless, however, than the front jean pocket-inside-the-pocket.

The small pouch is usually not big enough for even a coin collection denser than a couple of five-cent-pieces and you certainly wouldn’t get a smart phone in there, so what’s the deal?

The international frenzy of confusion has spanned decades but finally, a blog from jean-makers Levi Strauss has offered up an explanation, however prehistoric.

According to the site, the pocket is a watch pocket, small enough for one to keep a “pocket-watch” in presumably.

Levi’s is said to have introduced the pocket to cater to their cowboy clientele. Yes, seriously.

Watch: Saturday Night Live’s hilarious mum-jeans sketch. Post continues after video…

“Back in the 1800s, cowboys used to wear their watches on chains and kept them in their waistcosts. To keep them from getting broken, Levis introduced this small pocket where they could keep their watch, ” noted Quora user, Renata Janoskova, in an online forum on the topic.

Levi’s have continued to manufacture their jeans with the “watch-pocket” which they say has taken on many contemporary uses.

“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.”

The more you know!

What do you use your tiny jean pocket for?