Korean beauty standards are very important in Korea. It’s the first thing you see when going to Korea. There are many different beauty standards, and studies have shown that appearance is the first thing people look at when they meet someone.
Many Korean guys liked being called oppa since it makes them feel special. They don’t call everyone oppa because that would be weird to call everyone your “close friend.” Guys feel more special when they are called oppa since it feels like they’re getting closer with their girlfriends.