Originally Posted by
Braingel
Your first idea would not work, given it would only show someone is an extrovert if not being able see in brain, the Ep and EJ (Pe and Je). At most it would just show a bit, but maybe the creative introverted functions would show differently than that of base. But ten you still have two types between to figure out; the logical or ethical, which perhaps it can be easier show from that.
Second idea is fruitless. You can be attracted to anyone and even if not dual, it will be shown better. You would need have no one in a relationship. And they would HAVE to be strangers. Things like physical appearance, what you are attracted to, can get in way, though. Blue eyes versus brown, blonde versus brunette. Tall vs short.