Why Add the soft edge of the mouth to a long thin piece of wood to get something that woman use on their faces?

The soft edge of the mouth is added to a long, thin piece of wood to create a tool known as a "facial roller" or "guasha tool." This design allows for gentle massaging of the skin, promoting circulation and enhancing the absorption of skincare products. Women often use these tools in their beauty routines for relaxation and to improve skin texture. The soft edge helps prevent any harshness on the delicate facial skin.