The only way to deal with this issue is head on (no pun intended). You say that your husband isn't taking the time to give you adequate foreplay. This lack of attention is a form of nonverbal communication.
Your job is to get him to say, in words, not actions why he doesn't want to take the time to give you pleasure. I can tell you that such withholding behavior indicates that he is angry with you. When a person feels angry, he/she doesn't feel like being giving. If you can get him to talk about his anger towards you and resolve the issues that are triggering that anger, you will be on the road to wetness in no time.
Here's how to get him talking. You might say, 'For some time now you haven't been giving me foreplay and I get the sense that you don't feel like giving to me because you are angry at me over something. Can you tell me what it is that I am doing to piss you off?' When he tells you, take responsibility for your actions and the impact that they have had on him, thank him for his honesty, and then take steps to be more responsive to him (by doing what he wants or stopping doing whatever it is that he doesn't like).
When he feels more responded to by you, his anger will fade and the foreplay will flourish.