Maybe it's a parody of this song. I found it by searching for the phrase "whatever else."
(You can see the sheet music at The Lester S. Levy Collection of Sheet Music.)

MRS. GRUNDY
Words, George V. Hobart. Music, Victor Herbert. 1909.
Sung by Lew Fields in the musical comedy, "Old Dutch"

CHORUS: Oh, girls, be good; be good, I say, whatever else you do,
For Mrs. Grundy's eagle glance is ever fixed on you.
Oh, girls, be good; be good, I say. Don't roll your eyes about,
For Mrs. Grundy's looking, and she'll get you if you don't watch out.

[This song also has 2 verses that I didn't bother to transcribe.]