[mmj]

he gets away with it because he is smarter than darnell, and darnell is so dumb and self-unaware as to fall into the trap that was laid for him
i am not a big rex fan at all, i think he can be a bit of a di*k in fact so not really trying to defend him but i think he did believe sara would be able to stick up for herself and he didnt think it would go as far as it did, hence the apology