This associational principle was discovered by the Russian physiologist Ivan Pavlov in the early 20th century. But although his work is generally forgotten, these Pavlovian principles live on, at least in modern advertising. Called product placement, if you want to sell a Mercedes, cereal, or hemorrhoid medication, might as well place it respectively in Paris, among giddy children, or in the midst of happy adults traipsing through fields of flowers. In fact, if you want to sell anything, just put in the hands of happy people waltzing through fields of flowers. The latest product placement has been this below association that I've noticed in recent political ads, an association which I must say has strongly affected me.
I don't know about you, but somehow I'm suddently finding this Barack guy as something of a turn on.