Karma Sutra Police: Mystery over why Radiohead singer Thom Yorke's face is on the cover of an Iranian book about men's sexual problems 46-year-old appears on cover of Marital and Sexual Problems in Men It is not known why a headshot of the father-of-two was chosen Previously seen on Ukrainian advert promising to help headaches By Lydia Willgress for MailOnline Published: 03:12 EST, 14 May 2015 | Updated: 04:54 EST, 14 May 2015 Thom Yorke's face has been used on the cover of an Iranian book about men's sexual problems. The Radiohead singer - whose hits include Karma Police and No Surprises - inexplicably appears on Marital and Sexual Problems in Men, which promises to help 'sexual problems between couples'. The sleeve of the 80-page book also includes headshots of two other men, with some suggesting one is novelist John Updike. +4 A headshot of Radiohead singer Thom Yorke has been used on the cover of an Iranian book about men's sexual problems The cover was originally tweeted by a fan of the band, who claimed he found the book in his uncle's store three years ago in Mashhad, Iran. It is not known why the 46-year-old, who has two children with long-term partner Rachel Owen, was chosen to appear on the cover. The book can be bought online for 44 pence (20,000 rials). Mr Yorke has previously been used on a Ukrainian advert promising to help headaches and insomnia. +4 +4 The 46-year-old singer, pictured (left) in 2005 and (right) in 2003, inexplicably appears on the book, titled Marital and Sexual Problems in Men Some fans have expressed their confusion at the use of the image, with others posting amusing comments about the book on Twitter The blue billboard uses a press shot of his face in the centre and claims the product will people forget about insomnia, fatigue, skin problems, cold, attention deficit disorder and headaches. Fans have expressed their confusion at the use of Mr Yorke's face. Kip Manley wrote on Twitter: 'I know when I ponder marital and sexual problems, my mind immediately goes to Thom Yorke and John Updike. It just does.' +4 Mr Yorke has previously been used on a Ukrainian advert promising to help headaches and insomnia Another user, @CaliCurmudgeon, wrote: 'What the hell is he doing there? He doesn't belong there..' Mr Yorke is yet to reply to the cover on social media. MailOnline have contacted Radiohead's publicist for comment but have not yet received a reply.