Some friends and I met over some food and beers and chatted on a lazy Monday night. During this particular evening, we chat about a wealth of different topics as we dodge the noise from the Monday Night Football broadcast. I mentioned that as I recently watched a TV show, I had a flashback from a Mexican actress that I watched back in 1972. Another such moment was regarding a Robert A. Heinlein novel, Citizen of the Galaxy.
My friend recently picked it up and is actively reading it. I asked a few follow up questions to confirm that it is indeed the book I remembered. I politely omitted to mention big plot points to avoid any spoilers. He confirmed it; it was the very same book.