A Pretty Girl Should Have a Mammary

Tune: Irving Berlin's "A Pretty Girl Is Like A Melody"

A pretty girl
Should have a mammary–
Or, better still, have two.

One seems absurd.
Yes, a pair is preferred.
And holy cow!
Imagine how
Superfluous a third!

Now, four or more
Bespeaks flim-flammery,
As well as lack of grace.

It's a widely-held view–
Quota is two.
It's pretty clear
A bust should comprise a brace.