The record producer – one third of the Stock, Aitken and Waterman songwriting powerhouse – told the Daily Mail that he didn't think he could sit down to watch pop stars like Britney Spears or Lady Gaga with his mum or children.
He warned that children were being "sexualised" by modern pop culture.
"The music industry has gone too far. It's not about me being old fashioned. It's about keeping values that are important in the modern world.
"These days you can't watch modern stars – like Britney Spears or Lady Gaga – with a two-year-old.
"Ninety-nine per cent of the charts is R 'n' B and 99 per cent of that is soft pornography."
Stock, Aitken and Waterman wrote Kylie Minogue's career-making hit "I Should Be So Lucky" in the late eighties. Its lyrics – such as "We walk together hand in hand" and "I'm dreaming you fell in love with me" – are comparatively tame against the sexually suggestive lyrics of 24-year-old Lady Gaga's chart hits "Bad Romance" and "Again and Again".
Mr Stock said parents were concerned about images from pop videos and computer games like Grand Theft Auto and that they had even lost faith in brands like Disney.
He told the newspaper: "They were quite happy to put their kids in front of the telly to watch Hannah Montana but recently Miley Cyrus [who played Montana] has shown off her maturing body."
Cyrus, 17, has come under fire in the last year for putting on raunchy performances and wearing skimpy outfits.
Stock also hit out at the launch last week of the new Material Girl fashion range by Madonna's 13-year-old daughter, Lourdes, which features mini skirts and fishnet tights.
He says his new musical, The Go! Go! Go! Show, takes into consideration the concerns of mothers and is family-orientated.
He told the Daily Mail: "It's born out of my frustration with the way the music industry has gone."