A Dr. is doing his rounds at a lunatic asylum. He gets to Jones's room and knocks the door,
"Who is it?" say's Jones.
"Dr"
" come in"
Dr. "Hello Jones, how are you?"
Jones " i'm not too bad, thank you" .
Dr. " what are you doing with yourself today?"
Jones " i'm writing a letter to myself! "
Dr. "Ooh.. that sounds interesting, what does it say? "
Jones " I don't know! I won't get it till tomorrow!!..
