Demi Moore has reportedly confessed that boyfriend Ashton Kutcher is too "fast" in bed.

Leading fashion designer Cynthia Rowley said the "Ghost" actress let slip the bedroom secret as they discussed the pros and cons of dating younger guys, reports Internet portal Ananova.

Moore, 42, has been dating Kutcher, 27, for the last two years.

"We talked about sex. It wasn't that graphic - it was just that sometimes it's faster with younger guys," said Rowley, 46, whose husband is nine years her junior.