Necessity is the mother of invention.

With high gas prices and guilt about green, Adrienne So has an idea for the engineers to tackle. (Sorry, no photos for this post.)

Harnessing the untapped power of breast motion. – By Adrienne So – Slate Magazine
Still, if someone were to engineer a kinetically powered bra, even one that isn’t quite as comfortable as the old-fashioned kind, I’d be intrigued—and I might just start looking at my breasts in a different light. Maybe it’s not very sexy to see breasts as a pair of batteries, but oil prices are so high, people are jogging to work. It may be time for breasts to start pulling their own weight.