I'm a thief.
Why do you think you're a thief?
I take any items without asking, especially if I get that feeling of wanting to steal something.
It's fine to want nice things, but stealing them is not acceptable. Next time, save money to buy the things you want.
I just want to steal.
It's against the law to steal and you could get into a lot of trouble for this. Wouldn't you feel better earning the money to buy things?