Why do pictures of people drinking water make one thirsty? I drink a healthy amount of water each day and never leave myself thirsty for hours, but even when my thirst has been quenched I can look at images like pic related and come thirsty. I know many other people who have this reaction too.

Is this primal? What is the explanation for this? At least for me personally this doesn't happen with any other survival necessities. I don't look at pictures of food and become hungry, noor do I look at pictures of shelter and feel like I want to go outside. Is there a scientific explanation?