2. Look at the phone. If you sit, your neck is uncomfortable. If you stand up later, you may feel uncomfortable because your brain is not adequately supplied with oxygen. Even if the mobile phone is placed at chest height, it is natural and convenient to stand.
3. Young people have more flexible routes and transfer more. If they stand or walk for a long time that day, it will be very tired to stand up after sitting down. Anyway, I will go down soon, so I might as well stand.
The above is about "why do some young people prefer to take the subway rather than find a seat?" The answer to the question, hope to adopt.