Why is my left butt check fatter than the right check? Will it ever be the same if I keep exercising the one side only? (Photo)

I can feel it when I'm walking that the one side of my check is bigger than the other because of the dimple, this hasn't happened since I started working out. Is it maybe because my one leg is long then the other and while I was working out maybe the longer one got more work put into it? When I feel it I feel more cushion on my right side as well, it feels like it's ore juicier at the top and between my leg sort or.