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Use "rock-hard" in a sentence
"Janet Tamaro: When I was doing my research about how high that catwalk was and how big a fall that was onto rock-hard concrete, let's just say it's touch and go."
"Gia imagined herself melting, turning to mush against his rock-hard muscles."
"I could smell the faint scent of his cologne in the soft hairs surrounding that rock-hard motherfucka as I pulled all of him into my mouth."