Hugh Hefner began making sex tapes so long ago he had to shoot them in 8mm film.

The magazine mogul is currently dating 24-year-old Crystal Harris, who lives with him at the Playboy mansion. The couple have talked about getting married, with the 84-year-old apparently desperate to tie the knot.

Crystal says Hugh has always been open about his past with her, explaining she has quizzed about his sex life. He is rumoured to have slept with more than 2000 women, but Crystal is not jealous.

"I've asked him all about his past. He even confessed which lovers he made sex tapes with," she said. "Some date so far back that they were filmed in 8mm! But he had them all dumped in the ocean years ago because he didn't want anyone's career to be hurt.

"He was worried they would be stolen from his library during one of the parties."

Crystal has also discussed stars who have appeared on the cover of the adult magazine with Hugh. He has told her about his favourites, and admitted which ones he got intimate with.

Crystal refuses to be drawn on the topic as she does not want to embarrass her partner, but admits they have an active and fulfilling sex life.

"When I asked Hugh which cover girls he's slept with even I was shocked by some of the names," she explained in an interview with British newspaper The News of the World.

"They were names you'd never suspect, the ones who seemed so innocent.

"But he told me he didn't sleep with Pamela Anderson, although he wanted to. He said it was 'bad timing' as he was married and she was in a relationship."