It is their mutual preference for intuition (albeit of opposite attitudes) that Keirsey estimates to be the string that ties the knot especially in the case of an INFJ ENTP marriage.
This is the general theory but should by no means discourage from dating any type based on MBTI theory alone.
Romantic chemistry involves a lot more than what the MBTI could account for.
Indulge their love of debate Like all personalities of the Extroverted type, ENTPs too love being around people.
In their case however, the socializing often takes the form of verbal interaction so that ENTPs are known to derive great thrill from discussing and debating about ideas, concepts and theories.
Challenge them intellectually The Thinking aspect of the ENTP personality type is also reflected in their keen analytical mind and their love of solving problems.