Feldman described the pictures in a new interview with journalist Martin Bashir, who was responsible for the documentary "Living With Michael Jackson." That program, which aired on ABC in February 2003, has footage of Jackson and his accuser holding hands and Jackson defending his practice of sharing his bed with children.
Feldman, 33, said he went to Jackson's home when he was 13 or 14 and saw a book on the coffee table with pictures of naked men and women.
"And the book was focused on venereal diseases and the genitalia. And he sat down with me and he explained it to me, showed me some different pictures and discussed what those meant," Feldman said, according to an excerpt of an interview scheduled to air Friday on ABC's "20/20."
Feldman was contacted last week by prosecutors who want to question him about his relationship with Jackson, said Feldman's manager, Scott Carlson.
"I guess they're subpoenaing anyone who they think or hope might have anything to say," Carlson said.
Feldman himself was unavailable for comment because of a gag order in the case, Carlson said.
The actor, who starred in the hit 1980s films "Stand By Me" and "The Goonies," was arrested for heroin possession in 1990. He has been sober for 14 years, worked recently on the film "The Birthday," and has television and stage work lined up, Carlson said.
"He's been very busy. He had nothing to gain by coming forward and saying anything," his manager said.
Feldman told Bashir he didn't consider the nude pictures "a big deal," but became concerned because of the current molestation charges against Jackson.
Jackson, 46, is accused of molesting a 13-year-old former cancer patient and giving the boy alcohol and conspiring to hold him and his family captive. Jury selection in the case is scheduled to continue Monday.
Feldman said Jackson never touched him inappropriately and he never saw the singer act inappropriately with anyone else. He said he defended Jackson in an interview with police investigating molestation allegations in 1993 involving another boy. No charges were ever filed in that case.
"I did what I believed was right as a friend — I defended him up and down. I did so publicly and I did so behind closed doors with the police," Feldman told Bashir.
The 242 prospective jurors in Michael Jackson's child molestation case range from janitors to computer analysts and include people whose children have visited the singer's Neverland ranch.
The candidates answered a 41-question, eight-page survey that touched on issues such as whether they had relatives or close friends who had been diagnosed with cancer or accused of inappropriate sexual behavior.
"My disable daughter was allow to go to Neverland, but Mr. Jackson was not present during her school visit," wrote Juror No. 243, a risk analyst.
No. 54, a 48-year-old pastor, said Jackson's cousin is in his church and a Jackson employee "is my son's best friend."
No. 194, a 47-year-old woman, said her son works at the ranch and another son, 15, had gone to the ranch with a friend of Jackson "to ride and hang out."
The questionnaires, released Wednesday, were being studied by attorneys on both sides in preparation for individual questioning of the panelists.
The candidates, ages 18 to the early 80s, had an average age of 46 and a majority were female. Sixty-seven said they knew someone who has met Jackson or spent time at his ranch.
A few potential panelists said they, a relative or close friend had been the victim of "inappropriate sexual behavior of any kind."
Juror No. 16, a 48-year-old woman, said she was the victim of a sexual assault in 1974 but no charges were filed. She also wrote that she had been arrested or accused of a crime in 1974 and 1976, but she added "charges dropped, diversion."
The questions were designed to target people who might be sympathetic to Jackson because they or their families knew him, or people with military or law enforcement connections who might favor prosecutors.
But some prospective jurors said they had other reasons for being doubtful of Jackson's innocence.
No. 40, a 38-year-old teacher who said he had either met Jackson or spent time at his ranch, said it would be "nearly impossible" for him to be impartial.
"Having 3 children of my own, I am very sensitive to any type of child abuse. The actions that Mr. Jackson has admitted to with children are very disturbing to me," he wrote.
Most said they knew at least "a little" about the Jackson case and the 1993-94 investigation of similar allegations against the superstar. No charges were filed in that case.
"I'm sure I've heard something, but I don't remember exactly what. I was only 13 at that time," wrote a 24-year-old woman.