Related:

• Instead of burning a guy at the stake, what about burning him at the STILTS?
  It probably lasts longer, plus it moves around. -- Deep Thoughts, by Jack Handey...
• What is purple and commutes? An Abelian grape.
• Asleep, my love? What, dead, my dove? -- Shakespeare
• How come the dove gets to be the peace symbol? How about the pillow?
  It has more feathers than the dove, and it doesn't have that dangerous beak....
• What is purple and concord the world? Alexander the Grape.
• Q: What is purple and commutes? A: A boolean grape.
• Q: What is purple and commutes? A: An Abelian grape.
• Q: What is purple and concord the world? A: Alexander the Grape.
• Yo momma so stupid she took a umbrella to see Purple Rain.