On 07/12/2013 17:06, Gefreiter Krueger wrote:
Why won't you feel sunburn on your face first like you do on a hot
summer's day?

You don't feel sunburn until it's too late. You can't feel the UV on
your face, which is why people can get badly burned when out for a walk
on a windy day - they don't feel the heat.

Go ahead and don't protect yourself if you don't value your eyesight.
And next time your car is being fixed - don't watch.

Andy