A woman accompanied her husband to the doctor's office.  After his check up, the doctor called his wife into his office alone. 

He said, "Your husband is suffering from a very serious disease, combined with horrible stress.  If you don't do the following, your husband can die.  Each morning, fix him a healthy breakfast.  Be pleasant and make sure he is in a good mood.  For lunch, fix him a nutritious meal.  For dinner, prepare an especially nice meal for him.
Don't burden him with chores.  Don't discuss your stress; this will probably make him feel worse.  And most importantly, you must be intimate with your husband every day of the week.  If you can do this for at least 10 months to a year, I think your husband will regain his health completely."

On the way home, the husband asked his wife, "What did the doctor say to you?"

"You're going to die."