Connor Girls, yes I remember this from my girl guide campfire days, but we used to sing "bye, bye long johns" - a parody of Bye, Bye Blackbird.

I have lost my underwear
I don't care, I'll go bare
Bye, bye long johns

They were very dear to me
They tickled me, tee, hee, hee
Bye, bye long johns

How I miss that little trap door behind me
If you see it you'll know where to find me

I have lost my underwear
I don't care, I'll go bare
Bye, bye long johns