How can one test this hypothesis using data and AI that "people like to eat what they had in parties as kids"

Basically the hypothesis is that we tend to like food that we had as a group when we were kids. For example, the birthday party cake, candies and ice-cream. Juice and cup cakes are all party foods.

If the party foods of kids change for healthier like naturally colored salads and vegetables with multi-grain bread, then the actual taste of people will also change.