And with that preamble, I'd love to kick upside the head whatever fuckin' genius decided that we were going to start calling a guy's package his "junk." I'll assume the term came from the streets where the folks who live there never seem able to express themselves without constantly inventing new terms where they're not needed instead of making some attempt to master the mother tongue as it's spoken and written by those of us who communicate quite well using traditional words and the standard ways of putting them together.
Junk? There's nothing junky about my cock and balls. They're as precious to me as my eyes - and nearly as special to me are the ones I've licked and sucked! Keep your junk on the streets, but I'll keep my special purpose all cozy here in my boxers till it rises to the occasion of another precious play session.
You can call it my special purpose, but
don't you dare call it my "junk!"