There is a new brand of bra for the well-endowed ladies. It's called the Sheepdog. It doesn't lift or separate. It just rounds them up and points them in the right direction.
A Chinese Inflatable Bra Commercial
The Chinese have the answer for those who are less naturally well-endowed.
Booby Star - No. 3 - Busty Brown
Donna Mae "Busty" Brown was a very popular American pinup model of the fifties who also starred in many nudie cutie loops. Little seems to be known about her, but she has plenty of fans, not just for her amazing physique, but also for her manic mugging. Nudie cutie loops were generally silent and so they required the same kind of ability to communicate through gestures and facial expressions that was required of the stars of the silent movies of the 20s.
As the webmaster at The Big Breast Archive says her talent was the ability to look "as mad as badgers" in any number of different poses.
For more on Busty (and loads of other booby beauties) check out The Boobpedia.
Big Boob Erotic Story
Kelly's First Time by Stoneypoint
A 39-year-old tutor with lovely large breasts notices that her 19-year-old student Kevin can't stop staring at them, so she decides the only way to get him to focus on his work is to let him have a feel.