The survey by pollster Frank Luntz, conducted exclusively for Playboy magazine, found 25 percent of all Republicans and 35 percent of all Democrats have had more than 10 sexual partners in their lifetime.

The survey of 900 registered U.S. voters between the ages of 18 and 65, all of whom are very likely to vote in the 2008 presidential election, also found, on average, Republicans say they were 18.4 years old when they first had sex, Independents say 17.6 and Democrats say 17.5, the survey said.

Fifty-five percent of people who attend church every week consider themselves to be "sexually adventurous," while 51 percent of Republicans and 67 percent of Democrats have watched pornography with their sexual partners.

Americans belonging to both parties say they are more turned on by intelligence than by physical appearance, yet 23 percent of all Republicans and 24 percent of all Democrats would "definitely" or "probably" say yes to a one-night stand in the oval office with a president they found physically and sexually attractive.