Maybe it's because they make people feel sympathetic and curious. Their fear adds a layer of depth to the story.
Well, one reason could be that it gives us a chance to see their growth and how they overcome their fears. Also, it makes the cartoons more emotional and engaging. Scared cartoon boys can draw us in and make us root for them to become brave.
Well, it could be that they faced a scary monster or had a bad dream. Sometimes, just being in a new and unknown place can make them scared too.
Maybe they wandered into a spooky place by accident and came across the ghost.
Maybe they got lost or heard some strange noises that scared them.
Perhaps they're scared because they think a UFO is hovering above and they don't know what's going to happen next.
Maybe they encountered something really scary or dangerous in the story.
Perhaps they believe that whatever is scaring them is coming from the sky. Or it could be a way for the cartoon creator to show their sense of wonder and fear in a visually interesting way.
Maybe it's because their imaginations are too vivid and they think too much about scary stuff before going to bed.
It might be popular because it adds an element of mystery and intrigue. People are often drawn to the unknown and scared expressions can create a sense of drama.
Maybe it's because it evokes a lot of emotions and makes people feel for the dog. It's just so touching!
Well, maybe those with cute and simple designs that show the baby's fear in a funny way tend to be popular.