I am one who has experienced this. When I was getting hit regularly, it was usually in the evenings after getting home from work. My wife even thought that maybe she was causing my CH.
My theory is that she may not have been so far from the truth. I propose that there are different types of stress. The stress that some have at work is different from the stress faced at home. At work, one is usually working at a specific goal or goals. At home, the stress can come from many different directions: relationships with the wife and kids and financial problems, to name a few. Although most have long term goals (problem solving), the stress at home can be something that one has to deal with on an ongoing basis.
Just my two centavos,
Bob