After a seemingly Olympian effort between the bedsheets, Greece has become the most sexually active country in the world, according to a global Internet survey made public yesterday. The poll of 317,000 people by condom manufacturer Durex found that Greece topped the list of 41 countries. Greeks claimed on average that they have sex 138 times a year - compared to 134 for the second-placed Croats and well above the world average of 103. Greece moved up from its second-seed last year to France, who topped the rankings. Last year, Greeks said they copulated 133 times annually. The 2005 survey found the Japanese to be the least frisky with just 45 romps each year. But Greeks did not rank very high when it came to fidelity. Only 12 percent of respondents admitted to having only one sexual partner.