Yeah, that's what I meant by 'normal', that they are common and can be joked around with without much problems. 'Bitch' in particular really became a nearly neutral word for me in English, since Dean uses it with such a frequency and in a insulting manner just as much as in an endearing one, just as he can use 'Sweetheart' as an insult as well as a petname.

I also think this debate is where the cultural difference comes in a bit. In German terms like 'slut' or 'skank' or even 'bitch' really have a very strong negative connotation for me, they are by far not as common here as they seem to be in the States, so I can consider them as adequately insulting terms for Dean. I am just really not creative in swearing myself, so I think I have no real base to judge Dean's manners of swearing as degrading for his character (which is in itself a kind of funny statement!).