A friend of mine at Hendon County School, about 1949, would sing

Papa's on the bed
Mamma's on the floor
Baby's on the po
And he can't do any more
Hey ba ba rebop...

[some, IIRC, would pronounce chorus as something more approximating to Hey Barber Reeba]

which, unless I have carelessly overlooked it, doesn't seem to have been included in any of above variants.

~Michael~