Well, I guess as the language evolves so goes the culture - or is that reversed?
Privates: This was to imply that the (taboo) was something that was not shared or discussed with others.
Family Jewels: While perhaps an inappropriate allusion to the function, this term also correctly alludes to the value of their reproductive nature.
Junk: Wow. What a digression. Does this not correctly state our culture's perception of not only reproduction, but the man's function in society?
Family heirlooms are first private and treasured only internally. Then they become public jewels and gems that we begin to buy and sell or use for currency. Finally, they become so overly abundant and common that they become junk.
