Aging Mildred was a 93 year-old woman
who was particularly despondent over the recent death of her husband, Earl.
She decided that she would just kill herself and join him in death.
Thinking that it would be best to get it over with quickly, she took
out Earl's old Army pistol and made the decision to shoot herself in the heart
since it was so badly broken in the first place. Not wanting to miss the
vital organ and become a vegetable and a burden to someone, she called
her doctor's office to inquire as to just exactly where the heart would be.
"On a woman," the doctor said, "your heart would be just below your left
breast." Later that night, Mildred was admitted to the hospital with a
gunshot wound to her knee.

(LOL! It took me ages to figure out the joke.)