The main reason for the phenomenon that we call “electrification by friction” is that when two different bodies come into close contact, they become electrified; acquire electrical charges. Due to friction, the bodies are very closely pressed against each other and heat up a little, which allows electric charges to transfer from one body to another.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.