A recent exchange on a sunny summer day:
"Mommy, what are those?" (pointing to the hitchsack on the truck directly in front of us)
"I don't know, honey"
"Hmm...it's kind of strange looking. It's probably a joke or something."
"Yeah, I'm sure it's a joke of some kind"
I haven't covered the birds & the bees, yet. I am certainly not about to get into a discussion about why a truck has testicles attached to it. And to the idiots who have them: they are so not macho or mature. Then again, you probably knew that, which is why you and your sack are riding alone.