Was at a trading seminar over the weekend, wasn't really gaming or anything but i was fairly well dressed (i'm asian, so typical asian style). My general SPAM/mood was not exactly a game one...
In terms of the seminar i was fairly alpha in terms of "knowing" the most about the topic and probably clear that i was the only one there who would actually end up as a trader. But IMO that probably comes off as an arrogant personality more than anything else.

Second day in, went for a lunchbreak, got chatting to this girl (shes 18-19, also chinese) who was also there, we went and grabbed lunch together. Put on my "im a fun guy" face but i didn't take it too seriously, shared some interests (obviously trading--->getting a job in finance, couple of nerdy topics like anime/manga)
Hard to point out exactly what but IOI's were being given off
Didn't interact much after, after all, i was here for the seminar

Afterwards tell her to find me on facebook and she adds me first, we chat a lil bit then move to msn
Talk a bit about finance and then she says we should grab some chinese friends and go for a chinese meal, she says she should bring some girls along to hook me up (IOI?), and i make a joke out of it
Then all of a sudden she drops a bomb and says "have you ever had sex" and im just like...
Don't really wanna fall into a trap of just talking about really perverted stuff over msn but thats basically where it went, i tried to run jokes on a lot of stuff but she was basically spilling information to me and well, being a guy obv im just lapping it up, kinda tough for a guy to hold back

Ends up telling me shes a virgin and she seems like the kinda person that really wants a bf (and shes kinda horny), but obviously without putting the responsibility on herself, though shes been out with a girl before

Was gonna say that we should go grab lunch/meet up casually after lectures or something in the next few days, but shes already gone back home (we both goto the same uni, shes a fresher im 3rd year)

I'll be going on holiday for the whole winter break (3 weeks)
My current plan is to just try and casually meet up during the uni time when we get back, maybe have some revision sessions with her, and try to hold back talking too much online
But yeh how do you react to a girl like that? Obviously, i fit a lot easier with chinese demographic in terms of culture/tastes but yeah i'm pretty inexperienced in general as to where to go, i imagine that online talk gets REALLY stale quickly, and a lot of it can be an easy trap for a guy like me

Could give more details, but imo would probably be overanalyzing plus i can take things i hear with a pinch of salt anyway

Would be interested in input at least

Did you get her number? Call her up and just set up a meet somewhere, somewhere YOU wanna go, bring her into your reality. In other words if she agrees to see you , dont ask her where does she wanna go , just tell her where you two are gonna go. And also, instead of just focusing on this one girl, talk to a bunch more, and If this one doesn't like you or if you screw up , who gives a shit theres a lot more girls to talk to. Hope this helped , and good luck

Yeah thats probably a sweet idea

The main quesitons im actually asking is

a> wtf with girls that just bring up sex like that so quickly, i don't get what its supposed to mean, just being a horny teen or what?
b> any particular precautions given im gonna disappear for 3 weeks?

A. Maybe she just wants to see how you react . What did you do ? or say .
B. You don't really need to tell her unless you talk to her a lot or if she wants to hang out soon. There isn't really any "precautions" to take, its a holiday break, go have some fun!

Ps. I'm no expert so if you think this isn't gonna help you, fine by me , Im just giving a little advice and telling you what I would do , whatever I or ANYONE ELSE says on these forums aren't said in stone. You take what works for you best . (: