I've forgotten the name of the film, think it has Robert De Niro in it, where he says to some young fella that if the woman leans across the seat to open the drivers door for him then she is the one. Or something like that.
Anyway do you have a test or similar that determines what your opinion of someone will be? I don't mean setting up a test deliberately but something that happens naturally that if they do the wrong thing then there's no way back for them.
For example going into a pub upon arrival and seeing who wants a drink rather than just going up to the bar on their own.
Or one I saw recently, having dinner round a friends house, everyone has finished and they just took their own dirty plate to the kitchen rather than everyone elses.
I think there is a thread in here somewhere. Good luck finding it.