Though many people's recollections of their first experience of sexual intercourse are unreliable, as of 2005 the proportion of U.S. adolescents who have had sex by the time they graduate high school is almost

Question

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As of 2005, studies and surveys indicated that approximately 66% of U.S. adolescents had engaged in sexual intercourse by the time they graduated high school.

Though Many People's Recollections of Their First Experience of Sexual