Progressive muscle

"Well, you know, every bodybuilder has his own progressive muscle. Someone easily gets huge biceps, others stand on pillar-like legs, someone's pecs are tearing their shirts apart after a couple of months of training. My progressive muscle is my butt. Whenever I tense it even a bit, it gets visibly bigger. So I always had quite average-sized muscles obscured by my colossal butt. But it gives me my motivation - make all my muscles as huge and heavy as my ballooned ass."

PS: a new type of morphs for me - butt morphs. I'm excited to see your opinions on this so,please, comment it more)