Er, Melissa...the original of the song wasn't about ears. I seem to recall
it was originally a bawdy song, and referred to men's anatomy (hint: they
come in pairs). Your breast rendition follows close to the original. Likely
the breast version has a long tradition, too.

Margery Wilson, IBCLC
whose mom was shocked when the Girl Scouts
taught me the "ears version", since she recognized
the ditty.