Not a lion, a...

Not a lion, a... Do you think I'm a lion? If you look closely, I'm a... Humans treat me as a pet, but sometimes I think humans are my pets. Dogs constantly seek to please humans, which I find foolish. I prefer spending more time sunbathing and grooming my fur. Don't assume you know me well. Feed me some food you think I love, I enjoy drinking milk and eating ice cream, hahaha. Damn! No time for small talk, I don't want to waste my time. Because saying these things again costs me a few minutes of my lifespan!