If we're doing second life selfies I have some of those too, though I might be a bit too balloony to quite meet the rules
Dearest 3d Lumi....
Having spent a lot of time in Second LIfe, I know that a lot of the breast form you can buy are mostly "balloony" in shape. However, there are a couple you should look into. The first is made by Hemi Violet of Violet Studios and are called Vstrings. She has two styles, the Silicone Revolutions and the Heliums, both which offer three breast shapes and one of which is called the DongDong shape which has a more naturally pendulous, tear-drop shape. These are mesh breast forms and cost L1000. I use both the Revolutions, which are "smaller" and the Heliums and am quite happy with them.
The other one you might look into is called Saggies by Tiny Things. Though not as well constructed as the VStrings, they do have a very nice shape.
As with all things in Second LIfe, these breast forms are complex and require lots of experimentation to get them where you like them, but since they are mesh, they can be shaped with the avatar editing menu.
Here is a picture of the Heliums on the right and the Saggies on the left.
Lel