wrong strategy move. This indeed a stalker move. I would be scared also if i found a piece of paper stuck at my windscreen.

Be a man, confront her face-face and try to get her contact number. Of coz dun show your hamsup face lar when talking to her. Just be sincere and honest, be yourself will be good enough if you really have good intention beside sex sex sex only.

everyone has hamsup face lar just that how good u are in hiding it until it is suitable time to show it out.
when to show it?this depends on your experience and sixth sense

if guy no hamsup the population will extinct lor.