I just saw an add for "tubeless" toilet paper rolls. And, yes, they are basically exactly what they sound like: rolls of toilet paper without the cardboard tube in the middle. (Because, really, what purpose do they serve?)
Ironically, earlier today, I saw something on social media that pointed out that no matter how old you get, you always want to bonk someone on the head with the inner tube from a roll of wrapping paper.
It's a strange little coincidence, in its own way, the two different cardboard tube stories both showing up in my life on the same day.
I'm not sure what it means, but it really makes me want to try to bonk someone on the head with the next toilet paper roll tube, just to see if it produces any sound.