Why do we instinctively flinch when something comes at our face, even if it’s harmless?

This reaction is rooted in our survival instincts. The brain is wired to protect the body, especially vital areas like the face. When something quickly approaches, the brain perceives it as a potential threat and triggers an automatic response to duck or flinch, even if the object turns out to be harmless. This quick reaction helps to prevent injury, giving you a split second to protect yourself.