I study anatomy, cellular biology, and genetics. Its not like I read what your average joe writes and take it as gospel. I study this stuff like crazy, reading, listening, and watching everything I can to expand my knowledge. If you want proof that what I said about building different portions of a muscle is true, try to find information from a credible source that disproves my statements. You won't be able to. You will find people who have a hard time building their upper pecs who will hide behind the weak excuse of genetics. Your a big boy, if you want to read what professionals think, Google it or something. Pick up an anatomy or kinesiology book and go to town. Not trying to be a prick but I'm not going to spend time trying to find quotes for ya about stuff I've already researched. I do however agree with Ross86, this has been beaten too death, and has become pointless. So, I too am done with this matter. Good luck!