The younger brother of the boy accusing Michael Jackson of sex abuse said on Monday the singer showed both children pornographic Web sites, gave them wine in soda cans and called it "Jesus Juice," and once walked naked in front of them with an erection.

Taking the witness stand in the Jackson trial, the younger brother, now 14, said he and his brother were shown Internet porn on their first visit to Jackson's Neverland ranch, in central California, in 2000, when his brother was fighting cancer.

The boy, the only witness to the alleged molestation by Jackson, said he viewed several adult Web sites in Jackson's bedroom with his brother and an aide to the pop star. Jackson's young children Prince Michael and Paris were asleep on the bed.

"A lady had her shirt up. He (Jackson) said 'Got milk?,'" the accuser's brother said. "Michael told us not to tell our parents what we did."

The boy said Jackson remarked to his sleeping son, Prince, that he was missing out on the show, using slang for a woman's vagina.

On a later occasion, the boy said he was watching a movie at Neverland with his brother "and Michael walked up naked and picked up something. Me and my brother were grossed out. He told us it was natural." Asked if there was anything unusual about Jackson's genitals, the boy replied, "He had a hard-on."

Jackson, 46, is charged with molesting the older boy, who was 13 at the time, after plying him with alcohol on a subsequent visit to Neverland in 2003. He is also accused of conspiring to commit child abduction, false imprisonment and extortion.

The self-styled "King of Pop," who has pleaded innocent, faces more than 20 years in prison if convicted on all counts.

Defense lawyers contend Jackson was the victim of a scam by his accuser's mother in a bid to wrest money from him. They have attacked the credibility of the family, citing a record of conflicting statements about their changing relationship with Jackson.

The younger brother testified that he and his brother drank wine with Jackson several times, and that the singer called it "Jesus Juice."

On one occasion, on a private plane in 2003, he said Jackson "leaned over and handed me what I thought was Diet Coke. It tasted like the smell of rubbing alcohol. I asked what it was. He said it was wine."

The boy added his brother felt sick on the flight and "leaned over on Michael's chest and I saw Michael's head licking the top of my brother's head. He was licking his head."