Taboo of portrait photography: What does it mean to have a tree on your head?

When shooting people's scenery, we should try to avoid trees, telephone poles, buildings, flowers and plants in the background above the head of the person.

People are definitely not suitable for "culture medium".

Growing trees on the head is a taboo composition in the theoretical system of portrait photography, because putting background objects on the head, such as pillars, trees and telephone poles in the background, means that people and the objects behind them are in a straight line, which feels like a tree growing on the head, so the heads must be staggered, otherwise it will give people a feeling of awkwardness and loss of beauty.