Realistic Animations Help :(

[VMS23]

What methods or other programs does Blender work with? It's been a long time ago the state investigating unsuccessfully on how to make the most real movements, such as the movement of the breasts, or else, that the body sea more realistic and I suppose not only Blender will not be achieved as I have tried. My goal, basically, is not that I do sexual animations or sex mods. But I have a channel on Youtube where I dedicate to make series and how complex and easy to know how to make realistic animations and natural movements. They help me? :CCCCCCCCCCC