Well I'm assuming this happened during the Vietnam war, and those guys were pretty fucked up with some PTSD and stuff, plus they get pumped full of " murica " thoughts so he probably wasn't in his right state of mind
True, he is a doctor, maybe he kept it to study it and maybe do some tests. Kinda weird but the real thing is better than a model skeletal arm I guess, even if it is pretty gross....
This is fake. The guy actually gave him his arm because he wanted to be remembered by him. I guess it's the equivalent to a girl dropping a handkerchief or somethin...
And why the fuck would you give it back?
I guess you could say he had a ... Skeleton in his closet