What is the difference: DB bench press and DB flies?

DB brench press also works the triceps.
 
No, if they did, swapping in one for the other would have no effect on muscle growth.

Do the DB bench presses, when it comes time to change up exercises(1-2 months) then sub DB flies. But then you'll need something to work your triceps such as extentions.
 
Gotcha...I liked doing DB presses better anyways.
 
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