A while back, Chris has shown us the morph that smooths out the cleavage, basically joining the breasts together, and it is possible some here may not know where that would be useful. When women wear shirts and blouses, these don't crease at the middle like it usually happens in 3D clothing. In the example below, I have modeled this hoodie to keep a smooth surface between the breasts, which is how it happens in the real world - no deep creases in the middle.
However, whenever we apply a body morph that changes the breasts shapes, the clothing will most likely create this DEEP crease at the center automatically because morph projects will try to make the clothing conform to the body shape. It doesn't care about how clothing works in the real world.
Well, this is where the cleavage smoothing morph comes in. It pushes the crease out of the body, which makes fixing the shape easier. Ideally, it would be good if we could use this morph when projecting the body shape, so there wouldn't be a crease in the first place. This is not Dawn's fault - it happens with all figures and clothing.
So if your character uses a body morph that changes breast shape, and is wearing clothing, you will probably need this morph. Below you can see how natural and realistic clothing looks when they don't crease between the breasts. Most people may have never used this cleavage smoothing morph, but this is where it comes handy. Some people may jump to the conclusion that this morph is only for when creating 2nd skin clothing, but no, there is this other case that comes handy in nearly every time I create a custom character that is wearing something.