It's like my trips to a supermarket. I start with a shopping list of maybe 10 items, but come home with 20 or 30 items. And, often without one or two that were on that original list.
Or like in a restaurant, what I see other people eating often triggers my own choice. So whether shopping or eating, it's the whole experience, and feeling my way as the options unfold, but hopefully without forgetting why I am there.
Who I'm there with is also important. That's part of the journey. If they want to hijack my experience it's best to go our separate ways and meet back up later, if at all.