Household appliances

Son asked his mother the following question:

'Mum, why are wedding dresses white?' The mother looks at her son and replies,

'Son, this shows your friends and relatives that your bride is pure.'

The son thanks his Mum and goes off to double-check this with his father.

'Dad why are wedding dresses white?'

The father looks at his son in surprise and TAKES him on a walkabout,
he shows him the fridge and asks him what is the colour, to which the son replies : ' WHITE '.
he does the same for the dishwasher, the washing machine, the stove, etc etc.
Then he tells the son:

'Son, all household appliances come in white.'