Smartphones, sexy clothes and steamy TV shows are all reasons a new study says kids are growing up way faster than you think.
For parents, there's a reason the "Brady Bunch" days bring back memories of the good old days – especially when they compare their shows to what middle school kids watch these days such as "Pretty Little Liars", "Jersey Shore", and the "Walking Dead".
A study revealed more than 70 percent of parents thought their children stopped being childlike by the age of 12. Child psychologist Lynne Kenney isn't surprised.
"They're being exposed to greater information and more mature information at a much younger age," said Kenney.
Nearly 75 percent of parents in the study believed peer pressure was to blame. Boys felt the need to be macho and girls were concerned about their appearance. And what they like to wear would concern any parent.
"They like to wear push up bras or shorter skirts or lower cut shirts. Anything tight fitting."
Kalysta Waltz, who just turned 13, says girls her age get inspiration from Victoria's Secret commercials and magazines like Seventeen and Vogue.
"I want to change myself and I want to be able to look like them, act like them wear the same thing as them," said Kalysta.
Changing also means having the latest smartphone or iPad, and Dr. Kenney says that's where you can make a difference.
"Parents are in damage control a lot because they don't know what their children are being exposed to," said Kenney. "When they're between 6 and 12, you want to limit their access to smart phones and digital technology because they don't have to grow up so fast."