Looks like the OP is in the minority now.
I think that rule is stupid. I think that they put it in movies to be funny and some frat boys thought that it was real and picked up the 'rule'. Please, get over it. You've been a victim of the media.
You know what..why don't you do this. Realize that meaningful relationships are not games nor involve manipulation and treat the possibility of one with the same seriousness as you would like to find. If you are looking for a fun time with games and drama...keep following your '3 day rule'. But realize that it will get you no where but with some girls who are out for fun..which seems like where you are in life right now. Eventually, you will mature and 'get it'.
I never had the patience for stuff like that as you can tell. If I thought the guy was wasting my time with rules and manipulations, they were out.