Laughing, Frowning, Crying, ... just using your face for F*** sake!
Stay inside and sunscreen 100000 OR become taliban fan.
No laughing, No Thinking, No Crying, No Talking.
Or you can read all about it on:
Learn about the 3 layers of skin:
1st. The Epidermis = outerlayer = the barrier to external environment
2nd. The Dermis = second layer = contains the connective tissue. Types: collagen for strength, Elastin fibers for elasticity.
These 2 layers interact and it's important. Nutrients to the outerlayer are received from the bottomlayer.
3rd. Subcutaneous tissue. the fat cells.
The Confirming Friend says to read it, learn about it and protect that most important and biggest organ!