A 21st century idiom that is meant to serve as a stark warning for humankind. Let it be known that "bones" and "willies" literally pose a significant threat to ones health and well being... lit-er-ally. Whilst it may seem prudent to dismiss this admonition as nonsense or propaganda, I'd ask you to reconsider. The originator of this phrase is a visionary with diabolical intelligence and magnificent intuition... like that of a gypsy wizard.
When the world learned that bones & willies are bad for your health, there was mass confusion. The tension became so thick you couldn't cut it with a knife... it was like a wall.