How can you read a book upside down

A college student is deeply in love with his classmate but he doesn't know what to do to get the girl's attention.

One day, he came to ask the girl for help with his assignments and the girl agreed.

Happily, he came to sit next to the girl the next day and took out a book pretending to read.

After a little while, the girl asked: "You must be a genius. How can you read a book upside down?"