Honestly, I could care less how big her boobs are, as long as she has a set! I'm much more about legs and her ass!
In my opinion, a slut is a woman with a very healthy sexual appetite, and chooses to exercise it with whomever she chooses when single, and when attached, may also choose with her partners consent in an open relationship. A whore will have sex with anyone not caring for the reason, and will choose to continue this attitude even when attached, only hiding it from her partner! Ask any man who's ever been in married and had a threesome with his wife, and happily thought, "my wife is such a slut!". And then been cheated on and found out there were multiple partners and multiple incidents. Having to think, "my wife is such a whore!" doesn't have the same fuzzy feeling!