T&S are laughing all the way to the bank. The more controversial, the more swearing, the more people watch and therefore buy, which keeps the viewers, keeps the profits, and all QVC has to do is to blush like a Victorian maiden to keep within whatever guidelines there are. I've heard "******" before the 9pm watershed on other channels so I don't see what all the fuss is about. Anyone out there who's listened to people who use the f-word indiscriminately, ie, every second word is f-ing this or that, will know that the f-word becomes merely that - a word, and as such isn't as offensive as it is when it's used as a one-off or in an intimidating manner. To some that's shocking, to others not. That's the way swearing always has been and always will be used.
I think the induction these presenters get must have particularly rigid guidelines which could be why Marverine does the eye-rolling and very few of the others appear natural. They're terrified to step out of line.
As for T&S - sorry, ladies, you don't shock me. I don't swear much but I hear it on the streets, so to me your swearing is simply a superfluous use of words. "Arse" sounds a bit coarse and in fact, out of context, so why use it unless you're simply drawing attention to a crude word by your posh accent and trying to make yourself look more street-wise? It doesn't mean you're any tougher than anyone else - as some of the people I know would tell you, using much plainer language than "arse". You're using it as a sales ploy, plain and simple. Sad, really.