I guess it works

A young doctor had moved out to a small community to replace
a doctor who was retiring. The older doctor suggested the  
young one accompany him on his rounds so the community could
become used to a new doctor. At the first house a woman  
complained,

"I've been a little sick to my stomach."


The older doctor said, "Well, you've probably been overdoing
the fresh fruit. Why don't you cut back on the amount  
you've been eating and see if that does the trick?"


As they left the younger man said, "You didn't even examine  
that woman. How'd you come to your diagnosis so quickly?"


"I didn't have to. You noticed I dropped my stethoscope on  
the floor in there? When I bent over to pick it up, I  
noticed a half dozen banana peels in the trash. That was  
what was probably making her sick."


"Hmmm," the younger doctor said, "Pretty clever. I think  
I'll try that at the next house."


Arriving at the next house, they spent several minutes  
talking with a younger woman. She complained that she just  
didn't have the energy she once did.


"I'm feeling terribly run down lately."


"You've probably been doing too much extra work for the  
church," the younger doctor told her. "Perhaps you should  
cut back a bit and see if that helps."


As they left, the elder doc said, Your diagnosis is almost  
certainly correct, but how did you arrive at it?


"Well, just like you did at the last house, I dropped my  
stethoscope and when I bent down to retrieve it, I noticed  
the preacher under the bed."