Could Sams emotional experience of having a broken heart justify his actions of being happy with the fact that Chris was beaten?

Justify? Certainly not, could it be a reason instead of psychopathy... I'm really not sure, I cant see someone who was actually in love turn around and enjoy seeing them brutally beaten. It seems to me that Chris was seen as a toy that wasn't going to play along.

What if I added that all of the characters in the story are 13 years old. Does that change anything?

At first I was going to simply say no, but then I thought about if Pat was the only non 13 year old and that would change things. However reguardless of Pat's age he is still coaxing a 13 year old into sex. Society is pretty iffy on this but generally it is accepted when the age is the same, never occured to me to think about the act of buying and selling it though.

Considering they have about the same life experience, I still say it doesn't have an impact on the rankings. Was a pretty interesting thought though, would love to hear yours on the subject.