Obviously the word has a negative connotation, but sometimes words change meanings and connotations over time.
For me -- and this is just personal -- it is amusing and a bit exciting to think of myself as a slut. It excites my husband calling me his slutty wife too.
But not something I would say in public or stress beyond a small circle of friends
I feel the same way. Years ago I would have been disgusted with idea of my wife being, or being called a slut. Now I think of her as my little slut. Or my slutwife. But now it's term of endearment. I'd also like to see our hotwife relationship progress to the point where my wife is effectively society's idea of a slut is.