Credit: Photo courtesy of MTV © and TM MTV Networks Photo: Tony and Michelle Lock Lips

The sex-obsessed, drug-heavy MTV show Skins is under fire from a very powerful parents org. that's now calling for a federal investigation into potential child pornography violations ... TMZ has learned.

The Parents Television Council has fired off a letter to the U.S Department of Justice AND the U.S. Senate and House Judiciary Committees ... over concerns the show uses underage actors in graphic sexual situations.

 

Read the full story at TMZ.com.