I’m going to be killed for this

It’s been a while since I posted a joke, so here’s one from my work email:

A boy 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 says: ‘Son, all household appliances come in white.’