Is this normal?

How can a man going to school full time be so focused on school that he has no sex drive or interest?My husbands life has become his school work,taking exams,and what he's doing in school.There is nothing left but this and fixing the house.His entire brain is wrapped around the job he will be getting and school.He talks about our future such as the money and savings but shows no interest in intimacy.Is this normal?

I'm not so sure that there is a "normal" when it comes to thinks like this. It seems like it is in the normal range of behavior. How much stress is he under? School can be very stressful. How much stress is his job or worries about the house? There is a lot of detail that we just don't have that you do and he does---but stress can easily interfere with romance. One thing is for sure, the best thing to do about any marital problem is to talk about it so both parties know it is a small problem before it becomes a large one. It may simply be something that will solve itself once he graduates and the situations becomes less stressful---but in the meantime if he knows you can each make a mutual effort to meet each others' needs half way.

There are many "normal" people in the world with medical conditions that make them behave in abnormal ways. What you describe can be symptomatic of serious issues in some cases. A fairly simple blood test will determine if your husband is one of them. Take him to the doctor; preferably an endocrinologist.

http://men.webmd.com/features/low-testosterone-explained-how-do-you-know-when-levels-are-too-low