A lot of women don't realize their men are exhausted. They are overworked and stressed–and it can kill a man's sex drive. And if you don't see fit to take a little bit of time in enticing him into wanting to have sex with you, it's going to feel like a chore and a yet another burden to him rather than a pleasure.
My man was working upwards of 16 hours a day at one point in our marriage and I still managed to get him raring and ready to go. The main point here is you have to be much more accommodating, understanding and sympathetic to him and the mounting pressure he's facing in bringing home a paycheck and paying bills.