A wide-ranging study of Americans’ sexual behavior, based on the largest nationally representative survey since 1992, finds that condom use is becoming the norm for sexually active teenagers.

Indeed, they are more responsible than adults about using condoms, the researchers report in a study coming out on Monday. A vast majority of sexually active 14- to 17-year-olds  80 percent of boys and 69 percent of girls  said they had used a condom the last time they had intercourse, compared with well under half of adults involved in casual liaisons.

“I think that just as teenagers quickly develop an expectation that they’re going to learn to drive no matter where they live,” said a co-author of the survey, Dr. J. Dennis Fortenberry, a professor of pediatrics at the Indiana University School of Medicine, “there’s the same general widespread sense among contemporary teenagers that as you get to the point where you start thinking about having sex, condoms are going to be part of that decision.”

The new study, the first to include participants as young as 14 and as old as 94, finds that decades after the sexual revolution, the gap between men’s and women’s sexual satisfaction persists.