Teenagers 9 Teenage girls 8 Families 6 Sexual behavior 5 Teenage boys 5 Adolescence 4 Coming of age 4 更多 ... Social conditions 4 Youth 4 Female friendship 3 High school students 3 History 3 Man-woman relationships 3 Women's friendships 3 Boys 2 Gangs 2 Gay teenagers 2 Girls 2 Lesbians 2 Manners and customs 2 Mothers and daughters 2 Mothers and sons 2 Motion pictures 2 Preteens 2 Runaway children 2 Social life and customs 2 World War, 1939-1945 2 Young men 2 Young women 2 Abused children 1 少 ...