What vanity have you ever done?

When I was in junior high school, I was a general student, and my father borrowed a bicycle from a colleague. The one his daughter had ridden was a mainstream design, but a little old. After riding for about a month, I found that the classmates around me were all riding brand-new bikes. During this period, no one made fun of my bike, but I still resolutely gave up the bike. After that... I walked to school in the morning, walked home for lunch, walked to school in the afternoon, walked home for dinner in the evening, walked to school for self-study in the evening, walked back to sleep at night, and went back and forth six times a day, day after day, until high school. Living on campus... At that time, my dad told me, "You are vain! Vanity will harm you for the rest of your life!". Now, my dad forces me to buy new clothes every New Year. “If you don’t wear new clothes during the New Year! You will be laughed at by everyone!”