"but she trusts people and this is not good"

i'm having food looking out of the window and i'm listening to what the people at the table next to me are saying. not really my fault. at that volume i would have to fight it not to listen. boy1 talks to boy2.

- last time i was there with x when we were done with food she went to the washroom and i paid the bill before she came back. so she comes back and i pretend i haven't paid and i am like "go, go now!" and we actually left the place as if we are leaving without paying. she believes still that we didn't pay and she doesn't want to come here ever again. she's so dumm.
- well, if you were doing this to me we would have left and i'd probably have you thinking that i think we left without paying. she's nice. she just doesn't think this way.
- she's not stupid, she's actually bright. but she trusts people and this is not good.
- well, she's your girlfriend. i shouldn't say she a stupid bitch or something.

"but she trusts people and this is not good". i think this summarizes nicely what i cannot stand about social behaviors here. no comment on the last piece of conversation.