A new study suggests they still have fewer orgasms during sex than their partners do, even with age and experience.

Sex researchers and therapists have long known that women in heterosexual relationships tend to have fewer orgasms than men do. A large new study suggests that this “orgasm gap” persists — and does not improve with age.

The research, published recently in the journal Sexual Medicine, found that across all ages, men of all sexual orientations reported higher orgasm rates during sex — from 70 to 85 percent — compared with 46 to 58 percent for women. Lesbian and bisexual women between ages 35 and 49 reported higher orgasm rates than their heterosexual counterparts.

The analysis included data from eight Singles in America surveys, which are funded and conducted by Match.com annually in collaboration with The Kinsey Institute, the sexuality and relationships research program at Indiana University. The sample included more than 24,000 single Americans between the ages of 18 and 100.

Researchers were especially interested in the question of whether orgasm rates vary by age. Amanda Gesselman, a research scientist with the Kinsey Institute and lead author on the study, said she thought the team might find evidence that the orgasm gap narrows as women develop confidence and learn what they like (and, perhaps, their partners develop skills to help pleasure them).

However, while older gay and bisexual men and lesbian women did have higher orgasm rates, “we really didn’t see evidence of closing the orgasm gap overall,” she said, adding that she hopes future studies will explore the age-orgasm connection further.

“We really, as a society, sort of prioritize men’s pleasure and undervalue women’s sexual pleasure,” Dr. Gesselman said. “And I think that contributes to consistent disparities.”

Emily Nagoski, a sex educator and author of the book “Come Together” — who did not work on the new study — said a limitation of the study was that the survey asked: “When having sexual intercourse in general, what percentage of the time do you usually have an orgasm?” But it did not provide a more specific definition of what “sexual intercourse” means.

Research shows the majority of women require some form of clitoral stimulation in order to orgasm. So if straight women defined “sexual intercourse” as vaginal penetration alone, it makes sense that there was a significant gap in orgasm rates, she said.

A more revealing question might be, “What percentage of the sex you have do you like?” Dr. Nagoski said. “Orgasm is not the measure of a sexual encounter. Pleasure is the measure of a sexual encounter.”

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