Given she was openly laughing I'd say that was more a case of her knowing her boss would let her get away with it.
I think you have to take SFA as the comedy show that it's (mostly) intended as; the reason the arch singles out Caleb is because it's funny, rather than any coherent in-universe explanation. Same for why Thok goes so hard on him on sight - he's the protag in a comedy series, tons of bad stuff is gonna happen to him for the joke.Still violating bodily anatomy in a way that would ruin the life of people from certain cultures.