The rocker has two daughters - Violet, seven, and Harper, four - who know he was in a band with Cobain, but he is determined to shield them from the details of his former bandmate's grisly death.
He tells Rolling Stone magazine, "They know I was in Nirvana. They know Kurt was killed. I haven't told them that he killed himself. They're four and seven years old. So when they listen to (Nirvana's classic album) In Utero, they'll have that fresh perspective - the original intention of the album, as a first-time listener... Someday they will learn what happened. And it'll change that. It did for me."
Cobain died from a self-inflicted gunshot wound at his home in Seattle, Washington in 1994.