I got a kick out of this article at ABC News concerning appropriate breast display. From the piece:
From the beach to the mall to the office, women seem to be showing off their cleavage more than ever before. Why? According to Elisabeth Squires, author of "Boobs: A Guide to Your Girls," American breasts are getting bigger while shirts are getting smaller.
[...]
Squires suggested that women also keep things respectable at family events, like a kids' soccer game.
"This is not the time to show off your girls," she said. "Your children should not have to compete with your cleavage for attention."