Mr. Brite: "Yeah, my internist started me on 2 new pills last week."
Dr. Grumpy: "What are their names?"
Mr. Brite: "Ummm... One starts with 'M', and the other with 'S'. Do you know those?"
Dr. Grumpy: "No. What do you take them for?"
Mr. Brite: "Not sure. But they're both round. Does that help?"