Tonight I went to the University of Chicago's Rational Choice Workshop, run by Gary Becker and Dick Posner. The eminent sociologist Ed Laumann presented a paper on a survey he led on the sexual practices and opinions of 27,500 people aged 40-80 in 29 countries around the world. The paper was on subjective sexual satisfaction.
Laumann and his co-authors found that sexual satisfaction is higher in countries where gender roles are more equal, but that men report slightly higher satisfaction than women.
The paper can be downloaded here.