When you do discuss your sex life, what is the content like? What ground do you cover and is he receptive to talking?
What does he say his preferred frequency is? What is yours? Have you ever talked about working towards something you can both live with?
I don't personally know any househusbands but the only one I knew years ago did NOT have a good R with his wife. It is unfortunate if that's the problem. I'm with Jenny..it sucks to say that as it offends my feminist sensibilities, but it may play into it.
What was your sex life like before he quit working?
P.S. I'm sorry if all this was covered in your original post, I'm skimmin today ( ) since I have a sick child and a teething baby.