Design is everywhere
Yes. Everywhere. Even in your tea bag pouch.
Have you noticed the small cut in your tea bag pouch that is provided so that you can tear open the bag easily? When you face the front of the tea bag, it is on the right side.
Except for left handed people, this is actually not the 'convenient' side to tear. Without thinking we turn over the side and tear from left to right (using our right hand).
Do you now notice that, when you do the above action, the instructions on how to brew your tea is staring at you ! That is design.