Is it ok if I put some candy in my pocket when she wasn't looking?
How do you know she did not see you?
I know she's not looking because she's too engrossed in her book to notice anything.
So you stole it from her then? I get wanting to have some candy, but it would be more polite to ask for it first. You didn't get permission to take that candy.
It's the principle that counts. I just wanted to try them out; it's not like they are hers.
Well the candy did belong to someone and if you want to try the candy, then you should pay to who it belongs to. If not, then at least have the courtesy to ask if you could try a sample next time.