Every time I see this commercial, I cannot help but think it is an example of self-fulfilling prophecy, although a mistaken one. The man sees his shirt in the window and then notices people, especially attractive women, looking in his direction and being interested and smiling. Of course they are looking at the stylish car and beyond him. After this happens a couple of times, he begins to change his attitude and act more confidently.
Again, this is accidental, but seems to illustrate the point. Please let me know if you have a different view.