"Isn't that the Anvil Chorus?" I asked.
It's great to be able to make little jokes like that, based on shared cultural experiences. It's like the time that I was up at 4 because of jet lag. I couldn't go back to sleep, so he decided to wake up to keep me company. As we were going through our morning routines, he suddenly broke into song: "Nessun Dorma". I laughed so hard.
Don't worry, it's not all high-brow entertainment. We make horribly bad puns, too. We laugh every day because we have all these moments to build on.