Tee-shirts with graphics and text on the back are inherently more powerful. Graphics on the front of a piece of clothing are coupled with the face, and in order to look at a shirt with graphics on the front, you need to take in the human being wearing the shirt with front graphics as well. The transmission of the graphic artifact is diluted by the association with the body.

A graphic on the back of an article of clothing is more powerful, the broad human back is a plane where the graphic artifact can present in isolation.