Check out the Boob Choir!

[AD Chaos]

Go ahead and 'play' with them:
http://www.cupsizechoir.com/?k=1

 

[aberration]

Epic but ultimately frustrating.
Oh, and D is my favorite.

 

[AD Chaos]

They overlap into each other..

..But I guess that's on purpose

 

[jipchen]

Ahahaha wtf

 

[Felix Neumann]

Hahaha I´d prefer watching it without tone!