Toddlers put everything in their mouth because their tongue is their most developed sense at that point. It tells them more than looking at it or touching it with their hands.

My impression is we lose last what we gained first, plus taste is strongly influenced by smell and smell is known to be a powerful memory trigger.

The larger goal of the Dinner Party, as Broder calls the event, was to explore the power of food in triggering memories, improving quality of life, and enhancing neuroplasticity—things that are difficult to achieve with medicines.

Maybe doctors will eventually sort this. This paragraph gives me hope.