A family person may need some space for self even after marriage, but how far can (s)he really go looking for it makes the subject.
The movie starts with a confident young married guy who seems to know how to keep his married life happy, But he panics soon as he becomes a father and tries to adjust himself to his new 'family'.
The movie does exaggerate some aspects for the sake of humor.For an example, the ordeals of fathers in a supposed kids play. And the side effects that the title mentions were mostly one sided. But the director did try to make amends in this aspect with a hint at the end of the movie.
All the characters were carefully drafted and meticulously used.