I convinced my wife of the opposite by deciding to talk about a topic we never talk about in front of our phones. She was worried that she was seeing ads for th

I convinced my wife of the opposite by deciding to talk about a topic we never talk about in front of our phones. She was worried that she was seeing ads for things she'd talked about and I said that it was more than likely that she had searched for similar things and was getting ads based on what she likes. She wasn't convinced. So, we chose X. Neither of us play or follow X in any way. It's not something we'd search for or anything related to it. But we experimented with talking about X and at least one famous Xer that we could name. With our phones on the table. We never received any advertising about X.