Cores of Steel

So, to clairify, I swim and I know what's hard and what's not. Kind of. Anyway, one day, when we were using fins, my friend wondered if using fins while doing dolphin kick is what mermaids felt like. I turned to her and said: "You realize, that mermaids would have cores of steel and like six-pack abs, right? Since they're doing dolphin kick their whole life."

She stared at me and was like: "What the hell? I want to tell you your wrong and crazy, but I CAN'T. THIS ACTUALLY MAKE SENSE!"

So, yeah. Mermiads have six-packs and cores of god damn steel. Change my mind.