An old Irishman went to the doctor for his annual check up. The doctor listened to his heart and said, “I’m afraid you have a serious heart murmur. Do you smoke at all?”

“No”

“Do you drink to excess?”

“No”

“Do you still have a sex life?”

“Yes”

“Well, I’m sorry to have to tell you, you’ll have to give up half of your sex life.”

“Which half&mdsash;the looking or the thinking?”