Iggy Pop and Josh Homme were inspired to make music from their shared interests in "[their] sex life, furniture and German trivia".
Iggy Pop
The rockers - who teamed up with Arctic Monkeys' Matt Helders for the secret LP titled 'Post Pop Depression' -had a bizarre bonding session where they talked about their ideas for the album.
On working together, Iggy told Matt Wilkinson in a forthcoming Beats 1 Radio interview: "About half way through, we had a conversation about what we wanted to do. We didn't want to take anyone's money, we didn't want a record [label] person up our ass - we were willing to use our own funds."
Josh added: "It was a diverse layout of interests."
And Iggy revealed the things that turned them both on were, "Sex life, furniture and German trivia".
Meanwhile, the 68-year-old rocker said the band - which also includes Dean Fertita, from Queens of the Stone Age, and the Dead Weather, on guitars and keyboards - "sound really bloody good" live.
The record, which was made over a year ago between Josh's two studios in Los Angeles, Joshua Tree and Pink Duck in Los Angeles, is expected to be released in March.
Tagged in Iggy Pop Josh Homme Matt Helders