Oh I'm definitely not saying don't snitch, I hate that entire culture of letting criminals get away with stuff. I just mean it has nothing to do with two people being involved in a crime together
... it's a metaphor? Like it's one of those things, where even they have 'rules'. Because otherwise nothing would ever happen for them and everyone would be turning everyone in all the time. Not saying it's right, just explaining it.
stealing a bike doesn't make you Robin Hood