Find someone
gullible. Someone you
like. Say:
"Do want to join the
pen 15 club?
"It's a
cool club."
Take a
Sharpie, and ask your friend to
extend a hand. Write:
PEN15.
It's best if you have the type of
handwriting where it's hard to
distinguish the number 5 from
the letter S.
It will take a few
showers before your friend gets
the word "penis" off his or her wrist.