Books in the Bathroom?

So today I was wondering...why do people keep books and interesting things to read in their bathrooms??? Think about it. When you go to someone's house, and you have to go to the bathroom, you want to go and get out of there as quick as possible. Oh the horrors of taking too long in the bathroom! So, what is the point of having things to read in the bathroom then? If you were at home and wanted to read something, you would just bring it with you, but who, in their right mind, would go to the bathroom in someone else's house and take their time while reading a book??? Strange...