I think you're way off topic here.
Why would you be afraid to talk to a stranger? What did all your friends use to be to you before you actually met them? Don't get me wrong here I'm not saying that we would end up being friends or anything, maybe we would just talk once, maybe she would even think I'm weird, who knows.. But I really don't see why I shouldn't talk to her. Maybe there's a chance that we might get along, but then again maybe there isn't. If we don't get along then fine it would just end there, no big deal.
Furthermore, I am absolutely not saying that I want casual sex as a result. Your "big porn fantasy" sentence has absolutely no reason to exist.. I do agree that love should come before sex, and I say this again, I have never implied that I wanted to have sex with her. She is cute and seems like a nice person and if she freaks out or if we don't get along or anything then I won't be disappointed in any way. I'm not some kind of stalker either..
As for your argument about physical attraction, how do you think things work in pubs or nightclubs or such. Why should it be different in this case? Physical attraction is usually what comes first. I guess you'll give me a little speach about inner beauty, and I don't see anything wrong with that, I do agree that people are defined by what is inside, and that looks come after that. However, in this case looks come first, for the very reason that I don't know her. I probably wouldn't walk up to a girl and talk to her if she didn't appeal to me physically.
I fail to see why I should feel ashamed.
There I'm done, I hope you get my point of view.
You really shouldn't take this so seriously..
edit: Luke was faster than me there hehe.