The singer revealed he is tougher with his older children and said he instilled in them that they must “earn their living”.
He added to the Daily Mirror: “With the older kids I say, ‘You have got to do it yourself, prove to me you can earn your living’. And that is what they do. But the two youngest keep me young, beyond doubt.
In the same interview, Rod gushed that wife Penny is “everything’ to him”, as he reflected on their relationship.
Of their two decades of wedded bliss, he said: “I’m stunned that Penny has kept me around for 20 years.