Luke's Request

For years Luke has wanted me to buy him an accessory for the cold weather. I have blown him off, until recently when the requests/nagging are coming often and he does have to walk to school in the frigid temperatures.
The item is a ski mask with three holes.
How do you explain to your sweet child that:

This sweet face
plus +


a ski mask
equals =

The old neighbor lady mistaking you for the bank robber she saw on TV last night.
(ok, not the scariest picture. But this is a family friendly website!)