people with this kind of philtrum are able to guard their family (doors) well.
Let's call the who sides of the philtrum "income". In the olden days official used cereals as a replacement for income. The "income" represents the fortune of being able to eat, it represents financial luck. Oh sehun's "income" are wide apart, this means even if he gets older, his wallet will still be think with money. His philtrum is long and wide, the *yintang (in the middle forehead) between his brows is narrow, he has explosive skills and intelligence. He is able to grab hold of what he thinks people of the opposite gender want, the secret to Oh sehun's popularity is his ability to make his partner happy. In the start he is a popular man that is interesting and has explosive skills, which will evolve to an intelligent man that can understand people and knows how to wait, he will receive the adoration of people of the opposite gender