Sages' way of bathroom

One honorable man taught me how I should go to the bathroom.
He didn't lecture it on me, but somehow I found out how he does the bathroom:

1. I noticed that whenever he comes out of the bathroom, it gets cleaner than before his entering it. He cleans whenever he goes into the bathroom. Why? It is because he wants the next user to have a pleasant and joyful experience and to become happy.
2. He uses only one sheet of toilet paper or two at most. Why? It is because he wants to save papers. He knows there are many people in this world who could not have even a piece of paper. Thinking about them, he cannot peacefully use too much paper.
3. He doesn't flush water all the time--only when it's needed. Why? It is because he wants to save water. He knows there are many people in this world who could not have even a drop of water. For many people, the only water available is dirty water, and they get sick all the time. Thinking about them, he cannot peacefully use water as he pleases.