<< My bro is an exmarine and a perfect pushup is pretty damn hard. Arms square, fingers close together, back flat, you go down slowly and stop when your chin, chest, and stomache all touch the floor, then push back up all the way to the extent. That is a full pushup and they are friggen hard, I'd like to see you do 55 in a row of those. Infact, I'd be rather impressed. A full and correct pushup will work a whole ton of muscles in your upper body, from stomache to back to chest to shoulders to arms.
I personally cannot even do 10 correct pushups in a row. >>
Well, I'm not sure if those were "perfect" push ups, but then again I am pretty ripped, so I'm sure I can do more push ups than an average male.