Corruption

"I like people with dark sides."
"It's not a side; I am corrupt all the way through! Why are you so unbelievably stupid? How are you this thick?!"
"Oi, that's uncalled for! I prefer dense; thick makes me feel fat."
"You're unbearable! I hate you!"
"You keep telling yourself that, sugar."
"So this doesn't bother you?"
"Honestly, the wings are a tad disconcerting."
"I don't understand."
"That's alright, mate, I'm sure you're used to the feeling."
"I hate you."
"So you say."
"Am I supposed to be the hero or the devil's son? I can't figure out what side I'm on."
"And here I thought you were supposed to be my guardian angel."

In which, Dan is self-destructive and Phil is sent to be his guardian angel. Sort of.