what role does 'desire' play in our exerience of looking at advertising image

Mainly Complexed combination of mental and physical demands or some sort of hints which ,mostly,try to persuade people to buy something without reason.I mean,some advertisements just send messages to delude the watchers, unconsciously manipulate our decisions.

The actress who played in the advertisment of Haagen-Dazs can be the famous example. she sucked the ice cream in a deep emotion and seemed both enjoyable and sexy.