Chick test
She is testing you, think man.
When a girl says "I'm not into hooking up with guys", she is just saying "Prove me It's worth to hook up with you"
Why would she bring sex up, if she wasn't thinking about it? Get it?
For example if she says:
"I don't hook up with guys"
I would give her a funny look and say "With girls?" she cracks up
"No, I'm not a lesbo!, you're funny" (Touching you a lil bit)
"Hey, no touching here, or i'll accuse of sexual harrassment"
She cracks up even harder
"Unless you ask nicely, like they say It's not rape if you like it"
Get the idea?
Steal her frame, and make it seem like she's the one hitting on you, (this is VERY POWERFUL).
Start by getting her off topic, (The serious face), and make her laugh, then involve some sexual content.