I know this is stupid, but for me this is hard to tell. How can you tell if there's muscle in your pec area or fat...moobs basically. I've always been skinny and then started eating big and lifting and my chest has gotten bigger...problem is I don't know if I got moobs from a sloppy bulk or got muscle there from lifting. Certain angles and lighting, my chest looks like that of a bodybuilding and ripped. Then other times it'll look a little flabby. I think it looks like a chest from weightlifting, but I don't know for sure.
How can you tell?