Why Wedding Dresses Are White??

A boy 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."