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.'