A Pet With Metal Skin

Riddle: You might want to play with this pet, if you can't sleep at night. With its thin metal skin, it is a welcome sight. Many people wish to hear this animal's hiss. When they are away, it is something they might miss. Be careful when handling this pet, you might lose your wit. It might make you wet with its spit and its sweat. So don't shake it too much, because it will drool. This animal is fun when it is cool. If you play with it too much, you'll become a fool. When your fun with your pet is done. You will throw it in the waste. And in your haste. Might get another one. What is this pet?