As far as fat goes, your frame will not contribute much at all to your size. You'll be fat. If you notice some fats have less on their face or neck, but the bodies are fat, different shapes, but fat. I think frame is more varied when it comes to building muscle and gaining definition.  A slight framed person will have difficulty looking big, and a larger framed person will have a harder time looking lithe. Look at Dwayne Johnson. This is him at 15, even with much less muscle he has broad shoulders. His frame lends to him being built like he is, with the work he puts in, of course. But it wouldn't make him weigh drastically more if he was fat instead of muscular. Fat guys always use that bs because they like to believe women like big guys, which a lot do, just not fat guys. Same as fat chick's thinking men like their butter bags when they really prefer Katy Perry type boobage.