I'm looking for the title of a movie that contained some scenes with a character that did some amazing double talk. Here's what I remember: It was a Cary Grant movie; the double talking character was in the Navy, and was a friend of the Grant character; some of the double talking scenes took place in a hallway/office setting; I think it was black and white. The double talker was talking with Grant's girlfriend/fiancee/wife to confuse her to allow Grant to get away with/get out of something. That's it. Of course, I could be wrong about many of these details. The two I remember most clearly are the setting and the fact that the character was in the Navy.
Thanks in advance for any help!
pd