Nobody actually seeks an IE - not consciously nor subconsciously. People with problems generally seek out others that they think can help them solve it. T-type rationalization usually produces a body of output or perspectives that would be seen as useful to F-types, and vice versa, but note that F-types wouldn't normally seek out incompetent T-types unless perhaps they themselves were incompetent. One EII that I know seeks out a particular LII for everything mechanical because her LSE husband hasn't the aptitude. Now, Ijs do have an easy time plugging into Ejs because of their tendency to rationalize overtly and that they're similarly output oriented. Rather than 'seeking', I would agree with 'needing', but few people know what they really need let alone seek it......

a.k.a. I/O