I have watched the movie several times but just noticed today that Paul used to date Lauren. I didn't catch that before, for some reason I missed it when Shawn mentions it to her in the hallway. I just caught that today when she's like yeah I used to. Does it mention more of the relationship that she and Paul dated in the book? Thanks
I'm currently reading the book now and I don't think it has been mentioned so far but it could well be. Especially since it's said to be a love triangle, you don't hear much about that relationship. It's definitely worth reading though, as you catch things you may have missed in the film. For example, I didn't realise Sean said he wanted to get a "case of beer" and not a "quesadilla" lol. It is also not disappointing as Bret Easton Ellis' writing is completely mirrored onto the screen which I think is a very difficult thing to do well