As an INTP, it's part of why I love that I married another INTP. We can go days without any deep conversation beyond what's for dinner, and neither of us is bothered by that, but then one day (about twice a week, I'd guess) we'll stumble down some rabbit hole of discussion and we're both on our phones googling details while we talk, making notes for things to add to the conversation when it gets back to that point, and talking for hours. The topic always veers off from where it began, but wherever it goes, it's always something that we need to look up more information on, even if one of us knows some of it already, there's always more to learn and share!