There are a number of things that are there to make your life better and simpler, it's just that you have no idea they exist.
This cylinder on every laptop cable
Those little cylinder-shaped lumps are ferrite cores or chokes, and they're essentially just chunks of magnetic iron oxide that are there to suppress high-frequency electromagnetic interference.
The little bumps on the "F" and "J" keys
These bumps are used to help you find your way around the keyboard when touch typing.
Studs on jeans seams
They are originally used to strengthen the seams to support the stress being put on them by miners who used to wear them to work. And that small jeans pocket? Back in the day, the pocket was used to keep a watch, a lighter or some coins and gold.
The connective part in chopsticks
This connection exists only in disposable sticks and is used to signify that they are yet to be used.
The loop on the back of dress shirts
Today it is entirely decorative, but it used to be used to hang shirts.
Little holes in airplane windows
The hole helps compensate for the difference in air pressure between the outside and inside of the plane.
The hole in pen lids
That hole is actually there to prevent children from suffocating upon swallowing it, the tiny hole ensures air supply is maintained.
The hole in your pasta spoon
Besides letting water fall through, the hole is put there by the manufacturer to help you measure out one serving of pasta.
The holes in your Converse All-Stars
Besides ventilation, the holes were used by basketball players to tighten up the shoe by looping laces through the holes.
The blue side of the eraser
The rough blue side of the eraser can remove pen ink, but only if the paper is thick enough to handle it.
This pin hole on your smartphone
It's just the microphone hole for the back camera.