Related:

• Oh yeah? Well, I remember when sex was dirty and the air was clean.
• Whatever happened to the good old days when sex was dirty and the air was clean?
• In order for something to become clean, something else must become dirty.
  -- Imbesi's Law of the Conservation of Filth . . ....
• Imbesi's Law with Freeman's Extension: In order for something to become clean, something else must become dirty
  but you can get everything dirty without getting anything clean....
• Freeman's Extension: . . . but you can get everything dirty without getting anything clean.
• Sex is dirty, but only if you do it right.
• When you're flying through the air, remember to roll when you hit the ground.
  -- Safety Tips for the Post-Nuclear Existence...