Do duals know how to get under each other's skin?

[Clumsy]

This might be a bit of a weird question... but do the best duals for you know exactly how to get under your skin?

To sort of push you to confront the truth about yourself, even if it's not what you want to hear? And is this some sort of giveaway that said dual is somewhat closer to what you need?

For example, they know when you're BSing, or at least see right through you like no one else? (Maybe this is more of an SLE/IEI duality thing...)

I guess this sort of goes hand in hand with how duals can sometimes be so similar in certain ways as well.


In your experience, were there things that you didn't expect that you needed (even if you knew about duality), or things that you may not have wanted at all beforehand that your dual provided (and you ultimately needed anyways)?