Although it's usually accidental, researchers say more American children and teens are being exposed to online pornography found on sexually explicit websites.

University of New Hampshire researchers found 42 percent of Internet users aged 10 to 17 surveyed said they had seen online pornography in the past year. Of those, 66 percent said they had not looked for the images and did not want to see them. Their conclusions appear in February's Pediatrics, due out Monday.

"It's beyond the wild West out there. You've really taken away the age of innocence," said Dr. Michael Wasserman, a pediatrician with the Ochsner Clinic in Metairie, La., who was not involved in the study.

Online pornography was defined in the study as images of naked people or people having sex.

Marlboro, N.J., high school senior Emily Duhovny said X-rated images pop up all the time when she's online. Duhovny, 17, said the first time she saw one, it was shocking, but now, ��more than anything, it's just annoying. It's so common now, who hasn't seen something like that?"

"It doesn't have to be a negative thing, but that shouldn't be how you learn about sex education," continued Duhovny, an editor for Sexetc.org, a teen-written website on sexual health issues affiliated with Rutgers University.

Most kids in the survey who reported unwanted exposure were aged 13 to 17. A good-sized number of 10- and 11-year-olds also had unwanted exposure -- 17 percent of boys and 16 percent of girls that age.

More than one-third of 16- and 17-year-old boys surveyed said they had intentionally visited X-rated sites in the past year.

The results come from a telephone survey of 1,500 Internet users aged 10 to 17 conducted in 2005, with their parents�� consent. Overall, 34 percent had unwanted exposure to online pornography, up from 25 percent in a similar survey conducted in 1999 and 2000.

The survey has a margin of error of plus or minus 2.5 percentage points.

Online use that put kids at the highest risk for unwanted exposure to pornography was using file-sharing programs to download images. However, they also stumbled onto X-rated images through other "normal" Internet use, the researchers said, including talking online with friends, visiting chat rooms and playing games.

Filtering and blocking software helped prevent exposure, but was not 100 percent effective, the researchers said.

Better methods are needed "to restrict the use of aggressive and deceptive tactics to market pornography online" without also hampering access to legitimate sites, the researchers said.

University of Chicago psychiatrist Sharon Hirsch said exposure to online pornography could lead kids to become sexually active too soon, or could put them at risk for being victimized by sexual predators if they visit sites that prey on children.

"They're seeing things that they're really not emotionally prepared to see yet, which can cause trauma to them," Hirsch said.

Exposure also could twist their perceptions about what constitutes a healthy sexual relationship, said Janis Wolak, the study's lead author and a researcher at the University of New Hampshire's Crimes Against Children Research Center.

Still, many survey participants said they were not disturbed by what they saw, and Wolak said research is needed to determine how exposure to online pornography affects kids.

Source:Xinhua/Agencies