Poison Dart Frog
Poison Dart Frogs are so cute that people want to pick them up and cuddle them. The problem is, the frogs' skin is toxic and causes your skull to turn black. Fortunatley some dart frogs are born with warning labels that inform people of this very specific consequence. This would be great, except that the skull-shaped spots make the frogs even cuter, which somewhat defeats the purpose.
T-shirt: Super soft, 100% ringspun cotton. Comes in men's and women's styles. Main design is red and black, and the Donkeyshines logo is blue on the right sleeve. Shirt color is banana cream.