I think its informal because cool isn't a formal word
Whether it's going to see a scary movie in theatres or going to a haunted house, fear is all around. Many people go to these attractions, and this is because of the fun of being frightened. Here are a few reasons why.
The first reason is that fear spikes adrenaline. When adrenaline starts to run throughout the body, excitement can also occur. This excitement makes it even more fun for those who can handle it. The body also releases dopamine, creating an arousing effect all around! This also lets us know that we are safe.
The second reason why getting scared is fun is because of the joy of the thrill is very common. Studies show that people who like to be thrilled and challenged enjoy scary attractions or films more than others! To like to be challenged or thrilled is very common and can apply to most people, and even if some people don't, who wouldn't like a good haunted house?
The last reason why it's fun to be frightened is because being scared gets many people worked up! As mentioned in the first reason, getting scared releases adrenaline and dopamine, creating a fight or flight feeling. This also gets the blood flowing! Many people enjoy this feeling of a burst of energy, making it almost impossible to pass up a good horror flick.
Many people all over love a good scare for many reasons. Here are just a few!
