[roseblossom]

I thought about that because I've heard that gravity interferes in fat storage. But I've never heard that dominant sides interfere somehow... Gonna research

Dominance will definitely affect muscle development, especially if you mainly use one hand for activities that require strength (e.g. lifting items, throwing balls, etc.) Muscle development does not directly affect breast tissue, however...

I think it may be related to environmental signals, genetics, or injury. But how knows? I had melanoma of the right breast as a teenager. I had to have surgery. Part of my right breast was removed, and yet it is still the larger of the two...