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.
The 20th Century. Average Age: 12-13. In 1928, Howard Kelly, a gynecology professor at John Hopkins University, claimed that the average age to get your period for American girls was 13.9. Surveys of British teens in the 1950s and '60s found that they typically got their first period around 13.5 years of age.