A pregnant woman is in the bank when it being robbed. A gunfight breaks
out, and she is shot 3 times in the abdomen. She is rushed to the
hospital. Miraculously, she is unharmed. After giving a full
examination, though, the doctor tells her, "I have good news and bad
news for you. You are going to have triplets -- but each baby has a
bullet in it. Luckily, they have hit no vital organs, and eventually
your children will pass the bullets naturally."

The woman has 3 healthy babies. Twelve years pass, and she had all but
forgotten the incident in the bank.

One day, the first child, a daughter, comes to her mother and says,
"Mom, the strangest thing just happened." The mother interrupts her and
says, "You passed a bullet, right?" The mother goes on to tell the
daughter the story.

A few weeks later, the second child, also a daughter, comes to her
mother and says, "Mom, the strangest thing just happened." The mother
interrupts her and says, "you passed a bullet, right?" The mother goes
on to tell the daughter the story.

Several weeks later, the third child, a son, comes to his mother and
says, "Mom, the strangest thing just happened." The mother interrupts
him and says, "You just passed a bullet, right?" The son says,
"No, Mom -- I was masturbating and shot the dog!"