Almost like a stereotype you associate with J or P that you maybe use to predict someone's type. Are there attitudes or gestures associated with P and J that maybe aren't completely associated and that wouldn't seem like they would be, to everyone. Dumb example... but I associate carrots or bananas with women... like that man is holding a carrot, so he must be gay. Ok I'm kidding, unfortunatly.
This can go for other preferences (don't say E/I, too obvious, like N, S, T, F), and it can't be directly associated. You can't say the first thing you notice about Js is that they're decisive. You have to be weird when you talk to me.