Lets say you're studying in the school library (uni) which is basically a spot where there are rows and rows of small booth/desks, and as you're walking up your seat which is directly behind another desk where a girl is sitting at. When sat down backs would be turned to each other though. Anyways as you approach you make eye contact with the girl, but its nothing special since she just looked up at you as you approached. So you do some work for awhile and then a little while later you notice the girl get up and leave, which makes you think shes done or whatever. What would you then do if she came back and it looked as if she had put on a lot of lipstick? I noticed her lips were really red, but I wasn't sure if she had just put them on since I only saw her face from the side before(but since it seemed kinda excessive I figured I would have seen it, but not sure). Is this sort of thing a girl would do if they were interested? And assuming you thought so, how would you initiate a convo without knowing whether or not she just wanted to study? Btw she left like 10 mins later or something.