Worried that your teenager’s sex life is affecting his school performance?

A provocative new study has found that teens in committed relationships do no better or worse in school than those who don’t have sex.

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The same isn’t true for teens who “hook up.” Researchers found that those who have casual flings get lower grades and have more school-related problems compared with those who abstain.

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The findings were presented Sunday at a meeting of the American Sociological Association in Atlanta.

A recent survey found that nearly half of high school students reported having sexual intercourse last year.

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Copyright 2010 The Associated Press.