Such a wonderful feeling isn't it? Sir rarely uses (little girl or princess) when He is pampering me (playing with my hair, rubbing my back, snoogling before bed) and it feels wonderful! A totally different feeling of satisfaction from being called 'slut'.
The difference to me (and I'm sorry for gong off topic here Laila) is that 'slut' is usually used when I am looking after his needs. The more he calls me slut, the more I know he understands I want to satisfy his needs, & take care of him. The softer terms of endearment are used when he is taking care of me. it makes me feel safe & protected & cared for.
Both make me warm & fuzzy (well actually one makes me warm & tingly) and neither deters from my role as sub or his love for me.