I have been doing dumbbell bench ever since I started lifting weights, but recently I have been thinking my form is F&CKED up. When I usually dumbbell bench I press the dumbbells straight up in a straight line and then bring them together to "kiss" at the end. Recently I started to bring them into more of an "arc" motion, almost like a fly/press mixture- more so a cable crossover type motion where you push and then squeeze. I hope someone out there knows what I am trying to explain and could elaborate on the PROPER form. My lower chest is HORRIBLE compared to the rest of my body, maybe this is why? Since the dumbbell bench was my "bread and butter" for most of my chest workouts.