That leads to marriage. Then each partner develops greater assurance and a sense of individuality, thereby leading to deep misunderstanding and conflict. Changed by the experience, they try to reconnect. The play also includes clever stage devices stretching toward some kind of universality. One is akin to film, the other akin to Oriental theater.
Scenes appear in rapid succession, like cinematic cross-cutting.
The dialogue comes across as both comic and true, full of Mamet-type false starts and overlaps, without seeming like an emphasis on language for its own sake. Jack and Jill have no trouble communicating. Jack and Jill haven't grasped the ramifications or the impact of too much emphasis on how to say things rather than what they say. Martin has created two very specific characters, rather than generic stand-ins for anyone who's ever been in love. Clearly Martin wants to show how even two intelligent, self-aware people can trip and fall while going hand in hand with the best intentions.