Why does the hotel toilet paper have to be folded into a triangle?

Why does the hotel toilet paper have to be folded into a triangle? I was curious to see this title in Luo Zhenyu's Luo Ji Thinking.

After reading this article, I realized that this is the communication way between designers and users.

Designers use their products, users don't have to read the instructions, they use them as soon as they get them. Such a product is a good idea.

I think the design is very profound, and the creativity and innovation with a particularly large brain hole are the best.

Think about the items we use every day, such as the volume button on the TV remote control, the pull ring of the can, the dotted line of the paper towel, and the key to turn on the light. We know how to use it at a glance.

Fold the hotel tissue into a triangle. The designer told us that the room has been cleaned. Please feel free to use it.

Facts have proved that a product is good. As soon as I brought it here, I used it immediately without reading the instructions. It's a good product.

The communication between products and users is not language but instinct.

This is the new knowledge I learned from the book Luo Ji Thinking.