They lack protective pigment

Top 20 Cat Memes of The Week - Cheezburger Users Edition #344 1

41 Hissterical Tweets About Fluffy Felines That Are Pure Catnip for the Hooman Soul 2

A Wholesome Bowl of 41 Funny Feline Treats for Cool Cats With a Whiskery Sense of Humor 3

20 Sweet And Cuddly Cat Memes To Leave You Feeling As Cozy As A Kitten 4

24 Fluffy Feline Friends Filling Our Purrsonal Space With Feline Fun 5

25 Uplifting Funny Memes Of Cats Being Complete And Total Derps 6

Might as well... 1

32 of the Funniest Felines on the Internet and Meowrvelous Memes to Claw Your Way to a Purrfectly Wonderful Weekend 2

Some day, some way 3

Prank call 4

Every time 5

Itty Bitty Turtle Goes Turbo Speed On A Tiny Skateboard And Chases Cats Around The House (Video) 6