You are overcomplicating this. You can't see your liver through your abdomen. It doesn't bulge through your abdomen. If yours does, then you have some very serious issues that you need to call "911" about.
More than likely, like most beginners, he is looking at his body in detail for the first time. That doesn't mean every "discrepancy" he notes is some serious disease or physical issue. Most of the time, they are simply realizing how their body is different than every one else's.