According to this Science Daily report:
A report of the American Psychological Association (APA) released today found evidence that the proliferation of sexualized images of girls and young women in advertising, merchandising, and media is harmful to girls’ self-image and healthy development.
To complete the report, the APA Task Force on the Sexualization of Girls studied published research on the content and effects of virtually every form of media, including television, music videos, music lyrics, magazines, movies, video games and the Internet. They also examined recent advertising campaigns and merchandising of products aimed toward girls.
Sexualization was defined by the task force as occurring when a person’s value comes only from her/his sexual appeal or behavior, to the exclusion of other characteristics, and when a person is sexually objectified, e.g., made into a thing for another’s sexual use.
Examples of the sexualization of girls in all forms of media including visual media and other forms of media such as music lyrics abound. And, according to the report, have likely increased in number as “new media” have been created and access to media has become omnipresent. The influence and attitudes of parents, siblings, and friends can also add to the pressures of sexualization. …
… Full text of the Executive Summary, Report, and tips on “What Parents Can Do” are available at http://www.apa.org/pi/wpo/sexualization.html
The report also cited research that suggests that exposure to sexualized images may impair girls’ cognitive ability — in particular, the ability do math!!