Why Wedding Dresses are White

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.”
(They are still looking for dad !!)