Unlike Abby Sale's "latest pair," we sang it this way in California, in the mid 1950s:

   She wears silk underwear, i wear my last year's pair

As for "Marching to Pretoria" -- we were taught that in school as well, and my mother, who was quite left-leaning, was shocked and proceeded to give me a long lecture about the evils of apartheid.

cat yronwode