I think when people look at pictures of food, they glamorize it in their minds. I imagine myself in a restaurant, eating delicious food. For example, I am a hotpot enthusiast. When I see photos of hotpot, I feel like I am eating delicious food in a hotpot restaurant. My theme also mentioned the word "reality", "real" life is easy to meet many bad things in life, through eating delicious food to make their mood relaxed. I think eating food is also a good way to relax yourself. So expectation and food will make people feel relax