"Stones" is slang for "balls" is slang for "testicles," which are attributed (metaphorically) to be the source of bravery. Acts of great bravery are said to require loins of great fortitude, viz. "balls of steel."

Sorry, it was in reference to this:

"I micro-predict that this will be the first of many livecasted coding personalities.”

Notch coding is both hypnotic and mutable in the way that a traditional Japanese rock garden is meant to be.

Ah. My mistake; turns out I'm the one that didn't "get it."

You coined the term "loins of great fortitude". You have nothing to apologize for.