LMPW and MMJ advise in Church publication on masturbation.
Laura M. Padilla-Walker, and Meg M. Jankovich, "How, When, and Why: Talking to Your Children about Sexuality," Ensign (August 2020), accessed June 29, 2021
Masturbation is often a child’s first experience with sexuality and is done in ignorance. Even young children are prone to self-touching, and how parents respond to these early behaviors can set the stage for how young people feel about themselves and their sexuality. It is important for parents to find a balance between helping children understand the why behind God’s commandment that sexual behavior occur within a marriage relationship, while also not reacting with disgust or anger when children engage in self-touching or youth admit to masturbating. If children understand the why behind standards related to relationships and sexuality (including dating, modesty, chastity, etc.), they are more likely to see the wisdom in God’s laws and have the motivation to keep them. As you teach these standards, remember that it’s important to do so without imposing shame or fear.