Ever felt that the third and fourth seasons of Everybody Loves Raymond were better than the others? I wonder if your reasoning is quite the same as you'll hear in this deleted scene from This Is 40.
Barry is being played by Robert Smigel, the human avatar of Triumph the Insult Comic Dog and Barb by Annie Mummolo, co-writer of Bridesmaids. Paul Rudd and Leslie Mann we know as Pete and Debbie from Knocked Up.
The film is too long as it is and that 5 minute scene above seemed like it would never end. The film is filled with characters who have batshit ideas which they think are perfectly reasonable (like one who works part time as an "escort" but thinks it's okay because she only does it 10 to 30 times a year). There are also at least 2 scenes in the trailer for the film which aren't in the movie. Paul Rudd plays a 40 year old guy who started his own record company but he only sells talent who were big in the seventies or early eighties, when his character would have been ten years old or younger, which makes no sense because only someone who was 45 to 50 would have nostalgia for rock acts like this (his biggest act hasn't had a new album since 1982). So this is an odd film.
I actually liked this movie. It's not so much a comedy as a dramedy--kind of like a Neil Simon movie with a lot of cursing. The only part I thought was unnecessary was Debbie getting pregnant--that was too predictable a scenario.
That deleted scene was somewhat funny, but it wouldn't have helped the movie.