If I asked you to guess how many items can be found in an average Western household, I promise you wouldn't come close to the right answer. Nobody I have asked has guessed correctly. My mum guessed it must be thousands. "Maybe 5,000?" My sister reckoned that was an underestimate and doubled it. "At least 10,000." Guesses ranged from the hundreds to about 50,000 - but that guesser thought this would be the very high end of average. None of them are even close. Because amazingl