exel....you are so,so wrong!!...this applies to all cats...
"Sunburn
White cats, or cats with white ears and faces, are particularly susceptible to sunburn. Over a period of time, exposure to the sun can cause squamous cell carcinoma, a cancer found most often on the tips of the ears and nose. Early signs are a sore that does not heal, or that bleeds. My own introduction to squamous cell carcinoma was with our beloved little white cat, Arthur, who died of it at 18 years. Because of her age, we were reluctant to allow either surgery or chemotherapy, the two treatments of choice, and she passed on about three months after being diagnosed.
White cats should be kept out of direct sun as much as possible, and if they must be in the sun, you can help them prevent sunburn by using a sunscreen on their ears and noses. Your veterinarian can recommend one which will not be harmful if ingested."
http://cats.about.com...t101/a/heatstroke.htm