In the first scene, Sergeant Bruce demonstrates to Rose Marie that he is as much of a good tenor as the Italian tenor that Rose Marie is seeing. At the same time, he professes his love to her in song, while Rose Marie secretly ponders at the thought that she is in love with him while listening to his song. In the second scene, Rose Marie is dejected when she couldn't add pep to the song she was singing at the saloon and Sergeant Bruce has genuine concern for her as she could not keep up.
I haven't seen them in other films, at least, not yet.
These clips tell me that the male/female