There was a married couple sleeping and an intruder entered into their house. The intruder put a knife to the neck of the woman and said, "I like to know the names of my victims before I kill them, what is your name?"
"My name is Mary," the woman replied.
The intruder said, "You remind me of my mother who was also
named Mary, so I can't kill you."

The intruder then turned to the husband and asked, "What is your name?"
"My name's Phillip, but my friends call me Mary."