Never trust someone who's willing to openly approach you for sex especially if they don't know you or you don't know them. Being so open has a tendancy to mean one sleeps around. And with sleeping around comes surprises. Disease and the like. Second, founding anything off of sex just doesn't work. It's not a solid foundation. So while the sex may be enjoyable, it'll be a one time deal. Perhaps more than that if the sex is good. And it would likely mean that anything beyond sexual interaction would fall apart. Proceed to my first point again. Let's say you have sex once. And then a week later she comes round again to say hello. In that week she might have been round with others. And will now be passing something on to you. So is the potential for trouble worth it? No. A pretty complexion is a pretty complexion. Which can often hide uglier things under the surface. Talking, I would not be opposed to. Anything beyond that warrents retreat.