(CNN)The percentage of boys who start having sex at a young age can vary based on factors such as where they live and their mothers' education level, according to a new study. Yet among those boys, only about half described their first time as something they fully "wanted."
The study, published in the journalJAMA Pediatricson Monday, found that 3.6% to 7.6% of boys and young men in the United States -- nearly 1 in 13 -- report having had sex for the first time before they turned age 13.
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