New study found that between 4% and 8% of boys reported having sex before they were 13. That number varied greatly depending on where the boys lived. In San Francisco, just 5% of boys said they had sex before 13, but in Memphis that number jumped to 25%.

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New study found that between 4% and 8% of boys reported having sex before they were 13. That number varied greatly depending on where the boys lived. In San Francisco, just 5% of boys said they had sex before 13, but in Memphis that number jumped to 25%.