How old is old age?

It is now believed that Kurt Cobain, Nirvana's lead singer and guitarist, wrote "Old Age" in 1990 or early 1991, and later gave the song to Love (whom he married in 1992) after abandoning it himself. It was attempted during the Nevermind sessions, with a live instrumental take and scratch vocals being recorded, but Cobain never attempted formal vocal passes. This never-completed version was released on the Nirvana box set, With the Lights Out, in 2004, and on the band's compilation album, Sliver: The Best of the Box, in 2005.