I'd say it's pretty rare that the sight of your SO's hand deep in the toilet, scrubbing away stains is a turn-on. But according to studies, the more housework you do, the more often you're likely to have sex with your SO.
It all boils down to a "work hard, play hard" attitude. The study also links paid work and a high frequency of sex. Who knew? We all thought it was the other way around. Apparently, the more energy you put into one activity, the more energy you'll put into another.... and in this case, the horizontal tango.
Do you work hard and play hard? Can you see how this would be true? Or do you call this studies bluff?