IHAB game by the Joker (jack nicholson) in the first Batman:

Joker: Stop the press…who’s that?
Bob: Thats Vicki Vale boss..shes a reporter..shes dating Bruce Wayne.
Joker: Shes about to trade up.

Good stuff. I’d call this Mischievous Jerkboy Game. It’s not mean, it’s supremely self-congratulatory. It assumes the sale (she’s more likely to buy if she thinks she already made her mind up to buy).

If a girl is alone in your living room at midnight and she tells you she has a boyfriend, you say with a deadpan expression, “You’re about to trade up.” Cheesy? Maybe, but if spoken like an afterthought the cheesiness morphs into cockiness. And you all know from your time here at the Chateau that chicks love overconfident men.

Caution, I would use this line if it looked to me like she was already one vajflap into my bed. Subtler methods of psychological breakdown are needed fro girls experiencing sincere anti-slut hesitation and doubts, such as the takeaway and freeze-out.