They're busy lovers...

for personal reference only:

London - South Korean men are having sex more times a week than anyone else in the world, though Brazilian men are at it with a wider range of women, suggests an international survey published on Monday.
The poll of 40 000 men for Men's Health magazine found that Britons spent the most time on foreplay but flopped when it came to endurance, with Mexicans coming first for stamina in the bedroom.
On average, South Koreans said they were having sex at least four times a week, while Filipinos said they masturbated almost six times a week, the most of any nationality.
Brazilians topped two categories, with 19% saying they had had a threesome, which might help account for them having clocked up the most lovers at 11, according to the internationally published fitness magazine.
Polish and German men were found to be the most faithful, with 62% having never cheated on their partner, followed by Australians (60%) and Dutchmen (59%).
British men spend - or claim to spend - an average of 17.44 minutes on foreplay per sex session, longer than Australians (17.2 minutes), Germans (16.92 minutes) and Mexicans (16.91 minutes).
But British men last only 18.64 minutes from foreplay to climax, far behind the Mexicans (23.17 minutes) and the Dutch (22.42 minutes), while 60% of Italian men said they made their partner climax every time.