Many of us like to experience fear on purpose. We enjoy watching horror movies and sometimes a good scary book. People are fond of the rush of adrenaline they come in contact with. If their brain processes that there is no real harm, then then they experience the event as enjoyable. I will prove that the quote, " People love scary stories. There's fascination with fear themes, and we want to face those things in a weird subconscious way." by Mel Gibson, is true.
In The Hitchhiker, Adams goes on a trip to California and realizes that everywhere he goes, there is a certain hitchhiker that follows him everywhere or seems to be all over the place. Readers are entertained by this story because we find it creepy and strange