When I was in college I used to joke around that Mondays were “International Chest Day” in gyms across the world. Walk into any gym on a Monday around 5:00PM and you will see every single guy doing set after set of bench presses and hitting failure on every set. Then moving on to chest exercise #5 because they want to target the “inner pecs.” This chest obsession goes way back, to when we were really hairy and living in caves, and we had to show off our dominance towards other males to protect our territory and to mate with as many females as possible. Ever see a pissed off silverback gorilla? Just search it on YouTube. He puffs out his chest and pounds it with his fists to scare off any challengers.