I'm sure everyone has noticed that tiny, little pocket on the right side of your jeans and wondered what it's doing there. Especially considering the fact that it's inside a pocket which is functional and big enough.
What makes it more puzzling is that the pocket inside the pocket is not even hidden away. It's not a secret pocket; it's right there in plain sight.

To keep watches, coins, keys, condoms etc

Stalker365:
To keep watches, coins, keys, condoms etc

Bros u dey jump on :O
Wait nah

Back in the 1800s, cowboys used to wear their watches on chains and keep them inside their waistcoats. To keep them from breaking, Levi Strauss introduced a small pocket where it could be securely placed.
But most of us use it for condoms, don't we?

SOURCE:
https://www.scoopwhoop.com/Why-Jeans-Have-That-Tiny-Pocket/?ref=SWD&ep=GDN&utm_source=google_adwords&utm_medium=paid#.puggquclq