How to silence my cousin.

So, I was giving my cousin a ride to 7-11 for some badly needed ice that our family Xmas required. On our journey, my iPod played a song by Young Marble Giants, “Man Amplifier”.
“Who is this?” asked my cousin. I looked at her with an inappropriate astonished look.
“It’s the Young Marble Giants,” I said shaking my head to further my bewildered belief that she didn't know who in the hell the Young Marble Giants are. My cousin is about three years younger than I, not much distance between us, but I always forget that I know too, too much about music and I went on a long rant about the group. After I finished spewing information and finally took in a breath, I felt ashamed. I don’t know what good it does me to know this much about any musical group, and I don’t know why I am inclined to tell people what I know. This is what I told her, roughly…

“The Young Marble Giants are one of the coolest bands (I call every band I know a lot about--One of the Coolest Bands--because it sounds energetic and therefore makes what I have to say more compelling. Julian Cope suffers this bit of misinformation also, as indicated in his book, Krautrock Sampler, when he calls every album, The Greatest Album. People do it all the time. I’m a person.) of all time. They released just one album that has influenced so many people and so many, many bands. Are you serious, you haven’t heard of them? Shit… you know who Courtney Love is, right? Her band, Hole covered their song "Salad Days" and do you know who Beat Happening is? No, are you kidding? You know who Kurt Cobain is? Yeah? Well he has a tattoo on his right arm of the K records shield logo, and Calvin Johnson is the lead singer of Beat Happening and the founder of K records and Stuart Moxham, the guitarist and songwriter of Young Marble Giants, produced some songs on Beat Happening’s last album, You Turn Me On, before he went on to animate Who Framed Roger Rabbit. You didn’t know all that?”

My cousin didn’t say anything. I copied her silence.