FREMONT (CBS SF)— More than a 1,000 people have signed an online petition protesting the use of a controversial health education book in the Fremont Unified School District’s 9th-grade curriculum.

The book, titled “Your Health Today” is almost 400 pages long and among the subject includes information on bondage, orgasms, vibrators, along with explicit drawings and diagrams.

The text also describes how to buy and use condoms and addresses masturbation, binge-drinking and shows sex organs in various stages of arousal.

“Our high-school students today need all the tools they can have to arm themselves to make the best- informed decision,” said the school district’s Board President, Lara Calvert-York. Teachers from the district unanimously chose the book to incorporate in classes.