I usually try to close with or without IOI's, but this girl is in my social circle, so I wouldn't want a failure with her to prevent me from getting any success with her friends.
When I first met her she was so shy, wouldn't talk a word to me or my friends. She added me to FB -and she didn't add my friends, but well, I was the most talkative and friendly one so I can explain it. She's been initiating conversation everyday for more than 1 month.
I made some sexual comments the first day we chatted online -that conversation lasted 6 hours, from 11 PM to 5 AM lol. It was nice since she told me one of her fantasies.
I've also had lunch with her a couple times, but she is a lot shier in person, or maybe not so interested.
(Talking about my class, building material lessons -she is not my classmate as she is 4 years younger than me)
(not exact quoting since this conversation was in Spanish and I'm translating it)
Her: You should take your pants off, with no underwear as I guess you wear none, and slap your teacher with your thing and say 'hey, admire this building material'.
But well, yours is so small and so soft you wouldn't even impress her...
Me: Nah, I don't want to put my mates at a disadvantage.
Her: Is it THAT small?
If it was a building material all buildings would be like the Tower of Pisa.
Me: I know what to do with you.
Her: Yes, I too know what you want to do with me.
(omg she's giving me a beating)
Me: I'll take you to my class so you can check this material's resistance, the way you wish.
And knowing you, it's clear to me which test you will choose.
Her: Yes! I've done it in lab! I'll test your material's hardness with a steel perforator, I'll apply all my strength...
And I'll check if it can be cut with a knife... a coin might be enough...
Me: Wait wait. I think you shouldn't have the right to choose the test.
Her: Why not?
It's a magnificent idea.
If it was up to you I know what you would chose... and admit it you aren't good at it...
Me: Let my classmates decide!
I'm sure my female mates won't aprove your test (I ignored that "you aren't good at it")
Her: OK! I'll point at a girl in your class who has suffered a lot by men's fault.
Not so hard to find

She'll tell me what to do with your thing.
Me: But she'll know I'm different from all the rest
a good and innocent guy
and she'll perform a different test...
Her: Neither good nor innocent

That's what you want girls to think about you
And yes, she'll choose a different test... but not in a good way
Me: She'll use friction testing
and lubricating performance
and humidity resistance test
but she'll want to do it by her own, not just telling you, sorry.
Her: Friction testing using sandpaper
Humidity resistance test with sulphuric acid, how about that?
And don't forget a torsion test
I'll rip it off
But hey, aren't you the passive type of homosexual?
You won't miss it.
(so clever XD this is why I like her lol)
Me: Did I say I like your sexual fantasies?
Well, it was a lie.
Her: I so want to cut it off! And dissect it!
Me: Is it your greatest fantasy, dissecting my penis?
Her: This is not a fantasy.
But I admit this is turning me on...
Me: I'm meeting some friends now -truth
We'll keep talking about this.
Her: Noooo
You can talk to me through your phone.
Hey
Do you have any hot friends you can introduce to me?
Me: I am talking to you through my phone, actually.
But if I am with my friends I talk to my friends
And yes of course, all of them are ridiculously hot
Her: I don't believe you, I've met some of them...
Me: But I don't know about their dicks, we haven't got that far yet
In case you want to cut them off...
Her: Of course you know, but it's OK you don't want to admit it

How about the rest of their bodies?
Me: They all are hotter than me, so figure out.
Goodbye
Her: So they are average at best

Nooo

I'll have a shower
I don't want you to follow me in, you ignore me
I'll punch you
(I don't answer)
Well, she gave me a beating. I find this strange if she is interested. She's shy, it's her nature. I doubt she would be this... sexual? and this comfortable if she liked me. And when I meet her in person, she is so quiet I think I can't escalate...