Model husbands who cook, clean and generally help around the house may be missing out in bed, according to researchers.
Married men are likely to have less sex if they do a lot of housework, a study found. But they could improve their sex lives by easing off the washing-up and chopping wood instead.
"Couples in which men participate more in housework typically done by women report having sex less frequently," said study leader Dr Sabino Kornrich, from the Juan March Institute in Madrid, Spain.
"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 results suggest adopting traditional gender roles is important to sexual desire and performance, said Dr Kornrich.
Data from the US National Survey of Families and Households was used in the study, published in the American Sociological Review.
During the month prior to the survey, men claimed to have sex an average of 5.2 times and women 5.6 times. But couples in which women did most of the cooking, cleaning and shopping had sex more often.
The scientists looked at whether husbands who refused to do household chores might be more coercive when it came to sex, but ruled out this explanation.
"Wives reported satisfaction with their sex life has the same relationship to men's participation in household labour as sexual frequency," said Dr Kornrich.
"Had satisfaction with sex been low, but frequency high, it might have suggested coercion. However, we didn't find that."