What does this sentence mean?
"Get his number? Try get his pants. He was butt-ass naked in my couch by eleven, and boy, let me tell you-"
"Lovely, James. Lovely. Not one for playing hard to get, are you? Sounds a little slutty of you, to be honest. This is the age of AIDS, you know."
What does 'not one for playing hard to get' mean in the second person's response? What does 'one' refer to?