filled with in jokes and wit

One that stuck in my mind was Joan saying that when Benchley's character was working up to a proposal he veered off into talking about the sex life of the polyp. That is, of course, one of Benchley's most famous speeches.

I also like the wit in the dialogue and songs.

How about one where he suggests she strip and she says she's keeping her zipper up? Clearly, by WWII the audiences were NOT expecting to watch movies made for children. :) Censorship was obviously breaking down because the viewers were more worldly, and included many people in the military. When you are dealing with life and death issues, the Code begins to seem ridiculous.

One might say this movie harked back to the mixing of serious messages with song and dance of the depth of the Depression. In both cases you have plots that are both entertaining with the usual froth but show the audience that the moviemakers realize what is going on outside the theater and sympathize with it. My Man Godfrey and Gold Diggers of 1933 did that with the "forgotten men" aspect.