Dr Richters, an associate professor at the School of Public Health and Community Medicine at the University of New South Wales, uses data collected over 10 years from more than 25,000 Australians to make her case.
She questions Fry's comment that if women liked sex they would go cruising for anonymous encounters like gay men.
Women do go out looking for sex, but they tend to do it in safer group environments like entertainment areas, backpacker hostels and residential colleges, she told a women's health conference in Sydney this week.
Fry completely ignores the fact that men make sex dangerous for women, she says.
Dr Richters says women rate the pleasure of sex highly, especially early in relationships. Men are less positive early on, but report improved satisfaction over time.
"Both men and women like the sex in their relationships a lot, but men are more likely to be extremely keen."
This could be because "the heavy coital focus of most people's sexual practice, especially in longer relationships, works in favour of men's pleasure".
Emotional satisfaction with a relationship was similar. Both men and women are positive, but more men than women say they are extremely satisfied.
"There is not much evidence for women being the only ones who are in it for the emotional relationship. And it's true that men are slower to commit," she says.
- AAP