A new federal survey about sex and drug use in the United States reveals that an average American man has sex with seven women during his lifetime, compared with four male sexual partners for the average woman.

The latest survey, which claims to have used the high-tech methods to solicit candid answers on sexual activity and illegal drug use, found that approximately 29 percent of men reported having 15 or more female sexual partners in a lifetime, while just over 9 percent of women reported having sex with 15 or more men.

As far as drug abuse is concerned, the survey found that nearly 21 percent of adults 20-59 years old have tried cocaine or other street drugs at some time in their life.

The National Center for Health Statistics, a branch of the Centers for Disease Control and Prevention conducted the survey from 1999 to 2002 from 6,237 adults, aged 20 to 59. The method used was computer-assisted self-interviews that provides complete privacy for honest and candid answers.

The Associated Press quotes Dr. Kathryn Porter, who served as medical officer for the survey as saying, "This is the first time we've used this technique."

"The participants have a headset on, they hear questions, they touch the screen with responses. There's no one else in the room and they can take as long as they want," she added.