i got the research hrdgain
the chest is made up of
the pectoralis major
http://en.wikipedia.org/wiki/Pectoralis_major_muscle
the pectoralis minor
http://en.wikipedia.org/wiki/Pectoralis_minor_muscle
and the serratus anterior
http://en.wikipedia.org/wiki/Serratus_anterior
all of these muscles get worked when you bench, incline, push ups, etc, if you look at the placement of these muscles there is no way possible you can isolate any of them. and in all actuality when people refer to the look of their chest the are refering to the look of their pectoralis major. the pectorils major is one whole muscle. try to just move the top of your chest. or even the bottom.............................you cant because it is one whole muscle. it is impossible to work a part of a whole muscle. so when you say "you dont give a fuck about what anyone says", you should rethink that. its not about what anyond says, its about what it actually is.
saying you can work different parts of yoru chest is like saying you can beat different parts of your dick