The 83 year old lady finished her physical examination, the doctor said, “You are in fine shape for your age Mrs. Green, but tell me, do you still have intercourse?”

“Just a minute, I’ll have to ask my husband,” she said.  

She stepped out into the crowded reception room and yelled out loud: “Bob, Do We still have intercourse?”

There was a complete hush— you could have heard a pin drop.  
 
Bob answered impatiently, “If I told you once, Irma, I’ve told you a hundred times. What we have is........ Blue Cross!”