song of George Thingummy's out of Cuddle Up!. 'Always Listen to Mother, Girls!'
Nota : no musical called 'Cuddle Up!' was found. But there is a 1911 song by Irving Berlin called 'Cuddle Up' (cf. https://www.loc.gov/item/2016753545/) but without any reference to "listen to mother'.
[...] a small boy with a face like a turbot edged out in front of the curtain, [...], and started to sing that song of George Thingummy's out of Cuddle Up!. You know the one I mean. 'Always Listen to Mother, Girls!' it's called, and he gets the audience to join in and sing the refrain. Quite a ripeish ballad, and one which I myself have frequently sung in my bath with not a little vim;
The Inimitable Jeeves. 15 The Metropolitan Touch