Ok, but can we talk for a minute about how well they explained Moxxie and Blitzo's friendship in, what, two minutes?
That short flashback scene is crucial to understand why, despite all their bickering and fighting and Blitzo's emotional issues and complete disregard of boundaries, Moxxie doesn't give up on him.
Because Blitzo, in barely a few minutes, showed him more kindness than anyone had ever done since his mother.
Moxxie's life had just been shattered. Torn apart. He got his heart broken and his ass in jail. The person he trusted and loved more than anyone completely disregarded his safety for money.
Once again, he is all by himself against the world. Just like when Crimson killed his mother.
And then, this absolute weirdo just shows up and starts talking to him like they've been pals for years.
He introduces himself, talks a mile per minute, says a bunch of nonsense I still don't quite understand, mentions his daughter and how expensive his babysitter's gonna get... But most importantly, he has an escape clan and he's already included Moxxie in it.
Maybe it's for convenience. Maybe Blitzo would've done the exact same thing no matter who he got saddled up with. But the important thing is that, for all his flaws and issues, Blitzo can't bring himself to be truly manipulative and calculating, at least not if he senses the person he's trying to con is as vulnerable, if not more, as he is.
Let's draw a parallel between Chaz and Stolas, shall we?
Yes, Blitzo tried to murder or at least incapacitate Stolas. Yes, his only goal was the grimoire. But the moment Stolas revealed just how lonely he was and how much sleeping with his first friend meant to him, Blitzo couldn't bring himself to hurt him. And what did he do instead?
He gave our Owl boy the best night of his life.
Yes, he was mostly kinky and curious about M&M's sex life, but he could tell the guy was a douchebag. So the moment they were done, he went behind his back to figure what was really going on there.
Blitzo was genuine since the very beginning. Again, probably the first genuine person Moxxie's met since his mother, and he knows it.
This is the face of someone who's thinking, "Finally, a friend."