How do you know you're in a dual relationship?

[Mediator Kam]

Well, you have your personality type, right? Generally, you're seeking two functions that pair with your leading and creative functions. For instance, I am Ne/Ti, so I would be "seeking" someone with Si/Fe. When you're in a relationship and your partner has the two functions that you're seeking in the right order, you're in a dual relationship. That is how you know.

Fox: Hey there, you come here often?
Kam: I think tonight will be the first time.

Later that night:

^Example of dual interaction