Research relying on mothers' observations has shown that among children between 2 and 10 years old, ________ of boys and ________ of girls engage in hand-to-genital masturbation.

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The Answer of Research relying on mothers' observations has shown that among children between 2 and 10 years old, ________ of boys and ________ of girls engage in hand-to-genital masturbation.

Research Relying on Mothers' Observations Has Shown That Among Children