Sex Book For Children stirs controversy.

A children's book is at the centre of a controversy in Indonesia because it teaches children 

about masturbation.

A photo of the book - I Learn to Control Myself, written by Fita Chakra - has spread across social media since Monday, sparking a discussion online about sexual education and igniting parents' anger.

"Moms, please be careful when you buy a book for your kids. Check and re-check its content," wrote one user on Facebook.

Another said: "If this book is about sex education, why is the description about it so detailed?

One page of the book, which has been widely shared online, depicts a cartoon boy lying on a bed. He is saying: "I cross my legs around a bolster tightly. For fun, I move my body up and down. Oh... it feels good. My heart is pounding, but I am happy."

In another screenshot the child says: "I found a new play for fun. Sometimes, I put my hand inside my pants. I repeat, again and again."

Child and family psychologist Vera Itabiliana said that while it is important to teach children about sexuality in an early age, the book was targeting the wrong audience.

Despite this, the Indonesian Child Protection Commission (KPAI) has said I Learn to Control Myself is harmful for children and could lead to "sexual deviance".