First of all, you have to rule out physical problems like impotence. Next you have to look at his life/career. Many men work horribly long hours, and are just too pooped to pop at the end of the day. The look for signs of depression, or anger issues. If you have none of these problems, then either he has a very low sex drive, he is cheating on you, or something in your relationship is turning him off. Do you fight? Has he expressed any anger over bills, household matters or issues with the kids? Have you told him how much you want him? Some women wait for the men in their lives to make the first move ~ to initiate sex, but most men would love to have their women seduce them. If he feels he is doing all the work, it can become almost another job for him. You need to talk to him. You need to tell him in very plain language what you need. Don't hint. Don't insinuate. Men can be quite obtuse sometimes, so don't mince words.