In Douglas Adams' novel 'So Long And Thanks For All The Fish' there's a character called Wonko the Sane, who realised the world was madder than he was when he found instructions on the side of a box of toothpicks. When we flew SAS to Norway, we were pleased to see that the airline had taken medical advice when providing their toothpicks.
Here's a mop (sad to say, from Debenhams. Now discontinued). Men take particular note on how to move it backwards and forwards.
How to use a mobile phone case!