A 38-YEAR-OLD man refused to take a group of underage schoolgirls to a party unless they looked "slutty and revealing" in bum shorts, a jury was told.

Paul Milner showed the youngsters, aged 13 to 14, extreme pornography, filmed them twerking and looked in at them through his bathroom window, Bradford Crown Court heard.

He denies three charges of meeting a child following sexual grooming, two counts of causing a child to watch a sexual act and one offence of causing or inciting a child to engage in sexual activity.

Milner, of Bramble Street, Clayton, Bradford, is said to have committed the offences in March 2014.

He took the girls "cruising" in his silver Ford Focus and bought them alcohol and cigarettes.

Yesterday, a girl who was 13 at the time, said she and her friends had the run of Milner's then address.

He bought alcohol for them and they played music.

She sat in the front seat of his car when they went cruising, with three of her friends, aged 13, 14 and 16 in the back.

The teenager said it was early evening and dark and Milner stopped off at a shop in Thornton, Bradford, to buy vodka.

She did not want her parents to find out that he was buying them cigarettes and alcohol.

The girl said she was often in her school uniform when she met up with Milner.

She alleged he showed them pornography on the computer in his bedroom.

She said one extreme film, featuring a naked Chinese girl, made her feel sick.

The girl said Milner laughed and joked about the pornography.

"I just felt sick. He seemed all right at first but I thought he was getting a bit weird," she said.

She told the jury that Milner filmed the girls on his phone "dancing and twerking" at his home.

"We were teaching each other how to twerk," she said. "We told him to delete it but we don't know if he did or not."

She said Milner told them not to tell anyone they were going to his house and he locked the door when they were there because he did not want to get into trouble.

The oldest girl in the group, who was 16 at the time, told the court she saw Milner looking in at them though his bathroom window.

He bought them drink and "the more times we'd meet him, the higher the percentage (of alcohol) would get."

She said Milner offered to order the girls bum shorts on the internet.

"He said we wanted something slutty and revealing or he would not take us to the party," she said.

She also alleged that he offered to fix up one of the girls, a 13-year-old virgin, "with a lad" at his house.

The trial continues.