But there are some things you can do to encourage good napping habits: Avoid keeping a child up too late at night, which can prevent him from sleeping well during the day. And don't wait too long to begin his nap. Also, rocking or nursing a child to sleep at naptime is a mistake.
Losing It: Average Age of Virginity Loss in the U.S. According to a 2006 study, men and women in the United States first experienced sexual intercourse at age 17 on average. A 2007 study by Mathmatica Policy Research for The Kinsey Institute notes that 49% of women lose it by age 17, while 46% of men lose it by the same age.
So, the chart below gives the events and their ranges. The average age for periods in the U.S. is 12.16 for black girls and 12.88 for whites. By age 11, 28% of black girls and 13.5% of whites menstruate. By age 12, 62% of blacks, and 35% of whites. A girl's first menstruation is called menarche.