The Origin of the White Wedding Dress

A son asked his mother
the following question:
    'Mom, 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 Mom
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 says:
'Son, all household
appliances come in white.'