His dad said, "Son, did you know that all fingerprints are different? No two are the same.
The son said, "No, dad, but I know three people who have the same fingerprints."
"Well now, who are these three people who have the same fingerprints?"
The son said, "One is my dad, another is Santa Claus, and the other is the rascal who steals money from Mom's cookie jar"