Less than a quarter -- 24 percent -- of those surveyed from China and Hong Kong were able to achieve an orgasm every time they had sex.

Italy, Spain and Mexico tied for top place, achieving orgasms 66 percent of the time, said the Durex Sexual Wellbeing survey, which polled 26,000 people in 26 countries.

The French, famous for their romantic overtures, came in at a middling 48 percent of the time -- the global average, the survey said.

Other Asian countries such as Japan and Singapore ranked poorly with those polled saying they only reached orgasm 27 percent and 36 percent of the time respectively.

Of those who manage to climax, the Japanese were the least satisfied with the intensity of the orgasm while Mexicans and Brazilians said they were the most satisfied.

Women climaxed less than men, with 32 percent saying they reached the peak every time they had sex, compared with 63 percent of men.

Factors that enhanced an orgasm included delaying climax, longer foreplay time and having a strong emotional relationship, the survey said.

The survey also found that while men preferred to orgasm with a partner, women achieved an orgasm more easily through masturbation.

"If you want to have an orgasm, it's important that you allow yourself to surrender to the good feelings you are experiencing," said Kevan Wylie, a sexual health expert, in a statement.

Durex Sexual Wellbeing Global Survey 2007/2008: