Related:

• How you know when you have run out of invisible ink?
• Parables of an incarcerated man: If Americans throw rice at weddings, do Chinese throw hot dogs?
  Was Robin Hood's mother know as Mother Hood? How do you know when you run out of invisible ink?...
• When you run out of time you run out of everything.
• Life is like a fountain... I will tell you how when I figure it out.
• Q: How do you tell a woman with PMS from a woman without PMS? A: Beats the hell out of me!
• Q: How do you tell that your roommate's gay? A: When his cock tastes like shit.
• Colored invisible ink. -- Polish inventio
• Q: How do you make Windows run faster? A: Throw it harder!