One in 10 boys suffers nonsexual genital assault but does not report the incident to adults, despite a need for medical attention in 2 percent of cases, a study indicates. Assaults were reported by 9.2 percent of boys and up to 2 percent of girls in a telephone survey (with follow-up one year later) of 1,042 boys and 958 girls ages 10 through 16, according to the Dec. 6, 1995, Journal of the American Medical Association. Most common assailants were same-age peers. Assaults occurred in gang attacks, peer fighting, bullying and retaliation by girls against harassing boys. Few girls acknowledged nonsexual genital assaults, perhaps because girls are more likely to view such acts as sexual, whatever the assailants9 motives, researchers suggested.