David Bowie (QMI Agency file photo)

David Bowie’s ex-wife is set to test decency levels with a revealing new book on global sex.

Bisexual author Angie Bowie has researched eroticism and odd behaviour all around the world and she's hoping to follow up her memoir Lipstick Legend by opening up about her findings.

And she admits some of the things she will be writing about are more than a little shocking.

She tells BlogTalkRadio.com, "I've written a very large book called Pop Sex which will come out next year. It's the story of sexuality; an abbreviation for popular sexuality and it goes back in time in every culture, every nation.

"One of the things that amazed me through my research is there have been cases where mothers in Japan would pleasure their sons to stop them from catching diseases or getting girls into trouble. It shocked the heck out of me!"