The study, carried out by the dating portal C-Date, questioned some 5,670 participants from Europe and Brazil aged between 18 and 50 years.
The Swiss fared very badly, online news site 20 Minuten reported.
Of those asked, 25 percent said that male Brazilians and female Italians made the best lovers. Both male and female Swiss lovers received only 4 percent of the vote which put them at the bottom of the list.
However, the study did also show that the Swiss are very open about sex, with 23 percent of respondents confirming that they had made a video of themselves having sex with a partner at some point.
Both Swiss men (27 percent) and women (31 percent) confirmed that they used sex toys such as dildos and vibrators with their partners during sex, although four times as many Swiss women (16 percent) compared with Swiss men also used the toys alone.
Around half of all Swiss respondents admitted to thinking of another person during sex with a regular partner.
The Swiss also rated third when it came to the number of respondents who had had sexual encounters online.
Some 47 percent of the Swiss admitted that they had had one-night stands, compared with 55 percent of Swedes and only 24 percent of Italians.
Swiss men also did well when it came to reporting frequency of sex, with one in every five men asserting that they had sex every day, including those who worked 50 hours per week. The average however was once a week, in line with European standards.
The survey also found that Swiss men in leadership positions like to be dominated.
30 percent of the survey's respondents said they were single, while 63 percent categorized themselves as being in a relationship or married, and seven percent said they were separated.
92 percent described themselves as heterosexual, 5 percent as bisexual and 3 percent as homosexual.