CNN/Reuters reveals the trouble with older boys (excerpt):
Parents who forbid their daughters to date older boys may be on the right track. A study published on Thursday finds that teenage girls who associate with older boys are more likely to smoke, drink and use drugs.
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The study found that 58 percent of girls who had boyfriends two years or more older drank alcohol, compared to 25 percent of the girls who dated boys their own age or not at all.
Fifty percent of the girls who went for older boys or men smoked marijuana, compared to 8 percent of the other girls, and 65 percent of these girls who preferred to date someone older than themselves smoked, compared to 14 percent girls who stuck to younger boys.