From "Husbands who do more traditionally female housework have less sex" on ScienceBlog:
"Our findings suggest the importance of socialized gender roles for sexual frequency in heterosexual marriage," said Sabino Kornrich, the study’s lead author and a junior researcher at the Center for Advanced Studies at the Juan March Institute in Madrid. "Couples in which men participate more in housework typically done by women report having sex less frequently. Similarly, couples in which men participate more in traditionally masculine tasks—such as yard work, paying bills, and auto maintenance—report higher sexual frequency."
The study, "Egalitarianism, Housework, and Sexual Frequency in Marriage," which considers heterosexual married couples in the United States, relies on nationally representative data from the National Survey of Families and Households. Men in the study reported having had sex an average of 5.2 times in the month prior to the survey while women reported 5.6 times on average. But, both men and women in couples with more gender-traditional divisions of household labor reported having had more sex than those with more egalitarian divisions.
"The results suggest the existence of a gendered set of sexual scripts, in which the traditional performance and display of gender is important for creation of sexual desire and performance of sexual activity," said Kornrich, who co-authored the study with two University of Washington researchers, Julie Brines, an associate professor of sociology, and Katrina Leupp, a doctoral candidate in sociology.