It wouldn't be beneficial to carry extra weight because the existing fat doesn't move. Fat is stored in cells called adipose tissue. Think of them like little bags hanging from your body. On women more bags are hung is some places, like the breasts. On men more are hung on other places, like the belly. Everyone has bags in all the places, just more or less than the other sex. The bags can be full or empty and each kind of body has preferred areas to use to store fat, but once the fat is there it doesn't go until it's used. Over time (about seven years), all the cells die and are replaced so the body slowly switches where the bags are.
Only time is gonna change where the fat is. Some people believe that going in very lean is best, under the assumption that the body will put the fat in the new places.