I stole someone's sandwich from starbucks
Why did you steal someone's sandwich from starbucks?
I didn't like the guy and I was hungry.
Being hungry and not liking someone is no excuse for stealing from them. You shouldn't take things that don't belong to you without permission. You'll likely get in trouble for it and in this case might get banned from that Starbucks.
I'm an adult and adults get to do what they want. I don't see what your problem is.
It doesn't matter if you are an adult, stealing is always wrong You should stop taking other people's food.