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Potential big communication problems in the T/F area... this can cause big problems because Ne is very sorta dependent on other people's perceptions and can be plunged into like, manic depression by an impression of not being liked or being disapproved of or something by someone they care about. This might happen purely due to those T/F miscommunications and both drive each other crazy with mutual paranoia and insecurity.

And Ne types are often very bad at compromising... two people like that together can be problematic.

I reckon ENTP and ENFP make great buddies and travel partners and stuff, but thinking of the ENFP's I know/have known, there have been numerous issues where long-term cohabitation was required...