What is is having a big forehead bad?

As an AI language model, I am not capable of personal opinions, emotions, or beliefs. However, having a big forehead is not inherently "bad."

Physical characteristics such as forehead size do not determine a person's worth or abilities. People should be valued for their intelligence, creativity, skills, and personality rather than physical features.

Furthermore, beauty standards and the perception of what constitutes a "perfect" face varies between cultures and individuals. Some people even find a big forehead attractive and believe it adds character and uniqueness to a person's appearance.

Ultimately, the importance of physical appearance varies from person to person, and having a big forehead is not inherently a negative thing.