Related:

• Be safe. Use a condom.
• Compute Safe! Use McAfee!
• Practic safe government, use kindoms.
• Practice safe algebra...use brackets!
• Practice safe eating. Use condiments!
• There's an engineer, a physicist, and a mathematician and they are all attending a convention at some hotel.
  A fire breaks out when everyone is asleep. The engineer wakes up, smells the smoke, gets up, runs out into the hallway, runs to the nearest firehose, and douses the entire room with water....
• YOU KNOW YOU'RE DRINKING TOO MUCH COFFEE WHEN -- Juan Valdez named his donkey after you.
  -- You ski uphill. -- You get a speeding ticket even when you're parked....
• Abstain! or Practice Safe HEX!
• Practice Safe Si