Why is it that the chest and pectoral muscles are so difficult to develop, particularly if you're a skinny guy and no matter what you do you can still see your bones showing through? Pectoral workouts are clearly the answer...
but what exercises should you be doing in your pectoral workouts to get big rock hard pecs? Here are my top 5 exercises to include in your pectoral workouts.
They are compound exercises that will work more than just your pectoral muscles, giving you a great upper body:

• Bench Press
• Incline Bench Press (works the upper pecs)
• Decline Bench Press (works the lower pecs)
• Push Ups (can also perform inclined, wide-grip and close-grip push ups for variation)
• Dumbbell Flyes (great for working the inner pecs to fill out the chest area)

The key to success with the pectoral workout exercises above is to make sure that you are lifting a heavy weight to get the maximum muscle gain.
Aim for around 6-10 reps on 2-3 sets each exercise.
If you are struggling to achieve 6-10 reps then you know the weight is too heavy, and if you are doing them easily then you know the weight is too light.
In your pectoral workouts you should focus on keeping good form and technique as the more you can isolate the tension and effort in your pectoral muscles the more growth you will see.
I say this because sometimes with these exercises the temptation is to place more effort and strain on the shoulders and triceps.