No, really. It is science.
Sabino Kornrich, Julie Brines, Katrina Leupp. Egalitarianism, Housework, and Sexual Frequency in Marriage American Sociological Review February 2013 vol. 78 no. 1 26-50 doi: 10.1177/0003122412472340
Data are from Wave II of the National Survey of Families and Households published in 1996, interviews from 1992-1994.
The division of labor:
Core tasks include preparing meals, washing dishes, cleaning house, shopping, and washing and ironing; non-core tasks include outdoor work, paying bills, auto maintenance, and driving.
As you can see in the graph, the more of the "core" tasks a man completes, the less sex he gets.
The covariates for overall marital happiness and specific happiness with spouses' contribution to housework did not change this relationship. The covariate for gender-traditional ideology on household labor likewise did not change this relationship. Thus, none of these factors explains the relationship between sex frequency and the participation of the man in "core" chores.
One interesting tidbit of note in surveys like this:
women reported having sex with their spouses slightly more than five and a half times in the past month, and men reported lower frequencies, about .4 times fewer over the past month. Although it may appear surprising that husbands’ reports are lower than their wives’, existing research comparing husbands’ and wives’ reports has found similar results
I'm sure that won't cause any hilarious disagreement over which is the true value.
I'm sure the overall finding is entirely intuitive and agreeable to your sensibilities.
also, The Times is ON it.